Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0edcd9d643d3ba…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 07:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 173f1ae28394c8f42cc1131196639624 SHA-1: 52fb1cd36644773f4c403edc9608c23d3e8f7271 SHA-256: 7b0edcd9d643d3ba44f5da102acdde9fdd2fbc4724e355ff3ed505e66ad364db
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 0.9991

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://crophysi.ru/award?keyword=atresia+esofagica+embriologia+pdf PDF link annotation
    • http://vseti.life/87300641527c6pqt.pdfIn PDF document text
    • http://forpost-electrica.ru/66696267757ogwag.pdfIn PDF document text
    • http://pitushok.fun/online_android_program_compilere9jtt.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/koxojesug.pdfIn PDF document text
    • http://busibear.com/54396725641rilll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_6020d25bd6470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454821/normal_5ff2eed72b11c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454170/normal_602028c0956cd.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/5368589248.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/16447088141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493920/normal_600a216901a9c.pdfIn PDF document text
    • http://paxejunon.mygamesonline.org/journal_bearing_catalogue.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/bekasoxajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5fcf220f70eb1.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/social_psychology_11th_edition.pdfIn PDF document text
    • http://in-arenas.com/great_book_of_tattoo_designsvqy53.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/33895266312.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/fe0ab4e7-5c5b-421a-9ed8-bdfac7926c01/fisutiweze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc549544-2845-4d64-805a-81a35f7d3ff4/trig_table_sin_cos_tan_csc_sec_cot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b3c79c-0d2f-4ad3-8e4b-2373f61f7dc0/26387215774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ceeaea6-1330-441f-be79-9ed3d9c6fec1/nodalufakezonanep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1e06ff-408a-4945-832c-64ef02fd6f58/4559740967.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/i_am_not_perfect_but_i_am_limited_edition_meaning_in_urdu.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/78480387332.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4E 5604 bytes
SHA-256: 5ce4ee84b6459d60aa5deb90bf18a5990276350426e869d5aee85ef705f48f80
font_01_sfnt_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 12228 bytes
SHA-256: fc6bf4f4332a62ebac88104198d0a8f36201a7cf94444b3ff483ac456d45549a

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