Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e9441a2c5e8dfd…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 03:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b41682cec23aa82b4589a8a4a9fff472 SHA-1: a3b9251be79c47256320575f0d0923c6452841b9 SHA-256: 92e9441a2c5e8dfd02e8450c878ec2b64f701e249ae92068d0f1b9933626bef8
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 0.9996

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://golowaki.ru/wix?keyword=jerkline+skinner+job+meaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fc87a5927c10.pdfIn PDF document text
    • http://forsage.pw/91135350725tuojb.pdfIn PDF document text
    • http://good-production11.site/venous_malformation_radiopaediavljmm.pdfIn PDF document text
    • http://arm-watch3.club/lutiroriwetekizup0ivn2.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/nadodolexuriwib.pdfIn PDF document text
    • http://manthoughtswebsite.website/xezusazaxokafurekesomepda6sp.pdfIn PDF document text
    • http://zvezdasevera.online/distinguish_between_agency_theory_and_stakeholder_theory0x3q3.pdfIn PDF document text
    • http://moneymaya.site/mezawuliguxe0azop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5fcf57e755fbb.pdfIn PDF document text
    • http://alex-chekalev.com/contractor_agreement_template_south_africaj9pif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_604b4ed91221f.pdfIn PDF document text
    • http://noziwop.22web.org/walatosaxesuzorexeniwopi.pdfIn PDF document text
    • http://islta.fun/software_architecture_foundations_theory_and_practice_bookdgpa5.pdfIn PDF document text
    • http://d-youtube.com/135349222062artv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zodiripek.myartsonline.com/gastritis_aguda_hemorragica.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/penatowexuximimijir.pdfIn PDF document text
    • http://dadonugila.rf.gd/89317977660.pdfIn PDF document text
    • http://gulavofi.epizy.com/char_broil_big_easy_owners_manual.pdfIn PDF document text
    • http://bubinepet.epizy.com/5454837075.pdfIn PDF document text
    • http://jokosen.atwebpages.com/wotavofekuka.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/the_far_side_of_the_moon_were_able_to_seen.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/32978381477.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_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 5272 bytes
SHA-256: 9c65c917db5b762e194f503284ba3f11f61b2a4842fad1d8b0a6ae9047874b7f
font_01_sfnt_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 10648 bytes
SHA-256: cd68a810c4bab194f9ef59e6b0a4051a6a3596496eb5cbac2b2ce7b23ea4e635

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