Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ea5e9222a397bc…

MALICIOUS

PDF

78.5 KB Created: 2021-04-01 15:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f1a18b56bae542667911ea7a333f1279 SHA-1: 8622678257f1e347249ca5a06e8c070422c37533 SHA-256: 35ea5e9222a397bc608a9663247822f363911a1250759430905dd3abca64b0e5
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=what+does+it+mean+to+shadow+someone+at+work PDF link annotation
    • http://kyukty68.xyz/resudegekebugobokatovirorqc.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/roludikon.pdfIn PDF document text
    • http://bt-management.website/gramatica_a_irregular_verbs_answerslob04.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/iDohjgj/galaxy_wars_tycoon.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/HrgcBjf/find_my_phone_samsung_with_imei.pdfIn PDF document text
    • http://keepxufi.space/bee_gees_full_albumo1sw0.pdfIn PDF document text
    • http://esplus.pro/dasikirujewerurb3ok.pdfIn PDF document text
    • http://kompledom.com/why_are_jumping_spiders_cutela53v.pdfIn PDF document text
    • http://worldthailand.fun/download_adobe_audition_3.0_keygenj6mym.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/iggajc0/inside_out_characters_fear_costume.pdfIn PDF document text
    • http://helpcreditscore.info/53150918068kxs3n.pdfIn PDF document text
    • http://detonic-deutschland.website/chemistry_classifying_matter_worksheet_key4odgs.pdfIn PDF document text
    • https://cdn.sqhk.co/vexavudakepa/ffKxgiK/minecraft_pe_for_pc_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fe5848-d4bc-4f03-bc47-736d018f2c5c/kirkland_spiral_ham_glaze_directions.pdfIn PDF document text
    • http://milibelibagusez.epizy.com/ergobaby_360_infant_insert_nz.pdfIn PDF document text
    • http://wujijewukexewo.rf.gd/kenifinefavebutemefizib.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/4467436620.pdfIn PDF document text
    • http://boxalage.epizy.com/pet_architecture_bow_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9a5d5d-39a2-4563-8f66-ab8e15989326/taxilonakoragezeliwuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc711e4b-5d8d-4ec3-871d-b74360c0fbf7/wukisuwis.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/dor_abdominal_aguda_pediatria.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 5204 bytes
SHA-256: 5317c08e4359cba4e7750ade3f9e183273192831a2b840064b4fb01b9197f07f
font_01_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 10208 bytes
SHA-256: 7230a61428b73b29f7e423cc9267934825fc83cfb8dceff96e3a5a4b86970693

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