Malicious PDF — malware analysis report

Static analysis result for SHA-256 0360f0c031d3baad…

MALICIOUS

PDF

90.7 KB Created: 2021-07-25 15:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: a1ef483bda67b5f7a2ba3a2b21fb7365 SHA-1: cbddde49f5e6def74c740ae73e5fc589f046e4db SHA-256: 0360f0c031d3baad3c43afbcd2b5e79efb7e8f0ffb26ffe60def686acfb78df8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b52f89f31f9fe000753f9b8f263847a8/53969913315.pdf In PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ok13cs58hecl3acbc83fvcstlc/65848845655.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608759ed26b55---40974754383.pdfIn PDF document text
    • http://fkhd.cz/data/img/baxisavum.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/dnel1adpirttcdmrm70r1em5a8/98101758925.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6c0133595782d94585f31b9cf995524/60037077493.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/6641086726.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160850bf08d58a---zeworuvebufome.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/i4k1upvpsmiba46h8gkvacgsmi/87639605882.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/98966935348.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160946d11a91f4---funenixatuvebozarenekebis.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/d2917efd9cbfa7ad7c74dd22f1436d5d/zisarageponorupazanulide.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e64e0d1d6f3---remanirixasowinifef.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/vodulikiruvoxakonex.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e94b7fcae51ee4acc6fca4b9701cf8e8/89119840088.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/eiq5757vdf92a6mpfjhjso7phf/16964607466.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/34273403278.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/f0a0b4762df3abd491d6e0738eb96406/26883369991.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e51e8f6cb0d---sifefimakinavo.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/14465190820.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/86229653179.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/os3i0rio0cht8c53caadhegb51/zevigesenakurufisamor.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/d9hblnknl3lcmb6nr4c2rbse80/salaxogetexed.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/bowibupaxisivoramaratopa.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a70cfe293878c4b46627573029a5bcf6/bosazuvawajalonufumumev.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c3c9235f6---30202358836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=multa+para+quem+n%C3%A3o+usar+m%C3%A1scara+em+sp+dirigindoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 19072 bytes
SHA-256: 266189fca096777e8791dc4ad3dffa78a4bcf48a06cc2db7d9fc97693fb27a41
font_01_sfnt_off0001285a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285A 11540 bytes
SHA-256: d5bba4f03b69269346e46dd539cf0422ed601c61d6a1f428e0ba4d8dcdc5210f
font_02_sfnt_off0001425b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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