Malicious PDF — malware analysis report

Static analysis result for SHA-256 9248efc26508ae5f…

MALICIOUS

PDF

85.3 KB Created: 2021-07-28 06:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2d9cef3298cc33f05f913f9dc92f2ae3 SHA-1: 3bc6eaa3bc0387c4e6dbd49a40fa33e29c41544f SHA-256: 9248efc26508ae5faee18b7df975b1b7accfbacafdc4f64890757aa6a151214c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee6b62d501956a587421571b1d88c35a/64022626184.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/k9v34qvednve2vvlhilicbpog3/22044990779.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/90890853133.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/67123783622.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/13548321051.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/20487097566.pdfIn PDF document text
    • https://cape-electronics.com/media/file/79184612941.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bca3467e385---bejup.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/53633223969.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a5e30b06---kibidorupefiboxibulata.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a160ca8fb90---feraxunubapaxulesixisobax.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/86172987591.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c8443682396bce61fb807aec2be2bdf3/bakadojivoseturugomuxi.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/60152740790.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a0cdc6442063faf5485b234838496376/78719769858.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0237dafe54---panemibaseteboze.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/muvatudirugejizedila.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084314978665---52309995505.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/91545648246.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d92ac885ac---gazaromasini.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96895bc55---88548493694.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/khe5usei59pqrrmqjdr8gsc3n5/niposisipowog.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/1dd9c678012d28e4b40aa7f2e2b16dcc/xegubuvalidav.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f19ab0b0c---60706032461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=nonton+film+dreadout+subtitle+indonesiaPDF 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_off0000e928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE928 10732 bytes
SHA-256: dd4649ba814dbca33c006f89dec5e6538cb8e0bc78fa652eac5a77b1008183da
font_01_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 17380 bytes
SHA-256: f9e0a2215ae90ef6bef310c92fbfc2a12335bd9c89ceb9a11fd67f42857d8da1
font_02_sfnt_off00012ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1