Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf097ba450ccd0d…

MALICIOUS

PDF

91.9 KB Created: 2021-06-13 23:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e03fd1472289d43597c1d4cf0261e6fb SHA-1: 9ac7f6c4b7e66ac08ba04d08bd43b81f468c18ea SHA-256: 2cf097ba450ccd0d5da5e7b019b3e389679baa41621fb6d2c5bf9690c49351c2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nomylo.ru/uplcv?utm_term=clincher+sentence+starters PDF link annotation
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/5302734b7fdc7ee5f2530e4829ca776e/zavuvufufuredegiwusex.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/69196996769.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/tuvadeje.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/90ac3b70e5b778c5ea7d73cb49465335/nefoxojerutixe.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/56724573598.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/93ed371b92eb123ecbd6d95ee90fdf13/raxuwogewiximekener.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/padudigojepitovobiwelizil.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210601150751.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59127bcfc---68181865838.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/154da2531303af7ddccf1421dfc74b85/waravagim.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/50085198412.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/021ae3cddd42275898cb47a72affbeaa/zekoru.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/048ff7a37d8ae8b61d03828cbd9d8ee4/23214641304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEB 4588 bytes
SHA-256: 935086f0b4c583829686f06c65e507fc98e7ae384c66a72afe39cdb6f6d64bdd
font_01_sfnt_off00012f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5D 11020 bytes
SHA-256: 9b0ef3290441be425a7806168ed6e42958f18edee989971b7aabc2025cdbec68
font_02_sfnt_off0001549a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1549A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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