Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0acd474ef11e49…

MALICIOUS

PDF

72.1 KB Created: 2021-09-01 20:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6822666eeffbcf2dcae4c9d2ae0a0280 SHA-1: 38244b993d2cf35d81126657d8a2cb8f59bf37bb SHA-256: 8e0acd474ef11e4920825b0aec2e5e933b6802cabdf1e19f947edcc195c4bf40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/uplcv?utm_term=abcd+2+happy+birthday+song PDF link annotation
    • http://abwmechanicsville.com/uploads/files/wesamatuniriza.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/30937987336.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/8mpfkjnaouevpgpjkdqqrnenpc/dawulekefipixure.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/rasiwikegudusowilu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c41f88800e---gapaz.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/f8597eb2d1f0e484de2512bf1cb4f4c5/5139925657.pdfIn PDF document text
    • http://apple888.vn/luutru/files/67503497905.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4efe3cfe9---13146097697.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/dixugafiludapelisotej.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/95215842694.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d553883dd---sagetofefagipoje.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/59631873813.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/kisipobibapozifuvezakuj.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/24373985369.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/varigilanoninej.pdfIn PDF document text
    • http://jar-ted.pl/file/73655576337.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/somijinugatisubafugol.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/c3a2tvrbdtd9vk3c0kbtkbc9b6/fodopujoperowusutowev.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/59097663271.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/d1d3ad5110b39b9f8f97446accf6327a/likisisep.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/89347c7615f53e5fd0c6693bf053f87f/88468277853.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/13830167104.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/mikogopof.pdfIn PDF document text
    • 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_off0000b9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EF 15296 bytes
SHA-256: 87ab63238e8c752abd89d600917293ca152fa4e8bf70651407099dca92fdb78d
font_01_sfnt_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 10972 bytes
SHA-256: ac3aeb425c32f08f353b98bde9dd0c82ec1154e70ebc1a17ca98e8c829ad7976
font_02_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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