Malicious PDF — malware analysis report

Static analysis result for SHA-256 349421e56c259041…

MALICIOUS

PDF

84.8 KB Created: 2021-03-28 11:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6838de3e657eec5a404d4218dcbb19e0 SHA-1: 555d874ed3d48f8ac194403009887441924d6b3c SHA-256: 349421e56c259041cb052a761e89cce1cad7732f39727f7a8cf30629fcea28bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=3+rules+of+statutory+interpretation PDF link annotation
    • http://talajifit.mywebcommunity.org/the_history_of_love_book_download.pdfIn PDF document text
    • http://cosmeteca.com/703698089488w7pt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_600759e10fe28.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/honeywell_vista_128bp_installation_manual.pdfIn PDF document text
    • http://batut.space/php_json_to_html_treec8vuo.pdfIn PDF document text
    • http://brumbum2.xyz/sets_and_venn_diagram_worksheets_kutam60po.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446394/normal_5ff21e8659098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_6021ae0e188ad.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/antidiabeticos_orales_ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_604ff30e148e7.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/what_is_the_maximum_penalty_for_violation_of_the_ccta_exam.pdfIn PDF document text
    • http://zubiki.top/fozotipelaromjntfl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rizoli/datupil.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_18f930f232ef470db095246090b6ef5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/93744675493.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_af938f8750444dfba7290e2dce5ae415.pdf?index=trueIn PDF document text
    • http://xijewixevav.onlinewebshop.net/star_spangled_banner_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/sisogonovirerejujav.pdfIn PDF document text
    • http://pudosuvosav.atwebpages.com/nufoxiwumebosipovesurabo.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_900bd47e2dfb4fc286a5ee3e88d4d654.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_33f41f2704774b36bd848dd3789e60ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dusined/bodycon_dress_formal_dresses.pdfIn PDF document text
    • https://0315d410-4255-45a3-9477-873949dd02ac.filesusr.com/ugd/f85006_569f363307374e2ea660b16667b291d9.pdf?index=trueIn 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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 5064 bytes
SHA-256: db76e93c17aa0d03ce25ce347da12d5b3eb0a935a592c0ea82338272a4460cd5
font_01_sfnt_off0001223d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223D 10516 bytes
SHA-256: 7204a1fc7f8b8bc9b9c290b56cb834f1b160c5ef57bbc0473d191686ec7c723a

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