Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aee4981185cf29a…

MALICIOUS

PDF

79.9 KB Created: 2021-09-02 08:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aea0132fadda97fc117c8eb96d0711d3 SHA-1: 2a4b99bc1e2421b1bd1b646f35811dd8ce88e9b3 SHA-256: 1aee4981185cf29a328bd1da57befa935c848c3e663c6af8e996abea7341dc2f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to manipulate search engine results or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://aromamarketing.md/img/files/66300450038.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/b60anh8qul4cnl3t8bdtn7bjfr/sazozufekefur.pdf
    • http://mlead.net/images/e/file/zaduxawafazipadudilikijoz.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e53ec208a4f---16596314524.pdf
    • http://hochrainer-elsner.at/upload/files/lexovotefilofimiweruvinow.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a5871c828---94381117215.pdf
    • http://resurrection-life.net/userfiles/files/wunef.pdf
    • http://probeg2000.ru/files/userfiles/files/41871949140.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/72543447871.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff61e38be7---1005422699.pdf
    • http://www.aqsclimited.com/EditorImages/file/15367636027.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076628e7d74e---demakoxivalufovupipovo.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775bf71b7c8---guxamodajupofikijar.pdf
    • http://modnyi-buket.ru/uploads/files/movubezimoronukifigajojaz.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160e1e88d0d402---jikuraxakilato.pdf
    • http://studiosimonepantaleo.it/userfiles/files/96575526371.pdf
    • http://hyundaidongdo3s.com/images/files/piwujeduxere.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecba67ac3c---tifiwakoja.pdf
    • https://oilbasaro.com/web/images/ckfinder/files/20210702065702.pdf
    • https://promise-land.com/upload/file/dokamadi.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1edfa01fc34fa4b7584bbf9a54329a2b/kiter.pdf
    • http://bocghedanang.com/media/ftp/file/bovozuredexujerifunanipu.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/jofobogafipo.pdf
    • http://samnakthodrahassob.com/userfiles/file/nolijuviwo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=persistent+sore+throat+and+earache+on+one+side
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ab.bin
a77e6186f9808ee8ffd41fbb0189346a38182d72ae11046bc498034d917cb346
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 17540 bytes
font_01_sfnt_off0001012e.bin
1bea8902e5ca1bb6a0f2a7230cf814a56133538072c7300985eeaf7e6fb059f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 10424 bytes
font_02_sfnt_off000118c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C5 16792 bytes