Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc75dc12882f903…

MALICIOUS

PDF

90.6 KB Created: 2021-05-07 18:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4b4e5b66d58aad3ec69039b4c97f89a2 SHA-1: 10d2e6181bfb3c0b2006135395bdd454c3d95b91 SHA-256: fcc75dc12882f903bce968937bb7130b6a8161e791e1657aa7eefe2812ae12d6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=craftsman+shop+vac+12+gallon+5.5+hp PDF link annotation
    • https://suzaxuboju.weebly.com/uploads/1/3/4/3/134386311/wilazavaniw-jinebe-mejisaf.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/bowadufotozoke.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/8852682.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/fhatngc/reference_list_in_apa_format_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/0ibLWaX/metosipot.pdfIn PDF document text
    • https://wosabawa.weebly.com/uploads/1/3/5/3/135390578/6932275.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/aUxhjjf/digi_sport_1_stream_hungary.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/nofidabazawera-seraveso-jifufoda.pdfIn PDF document text
    • https://nidedijuba.weebly.com/uploads/1/3/0/8/130814831/5158831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_6030aa8daf6d1.pdfIn PDF document text
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/796765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_6016fe1607f68.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/ddab4588ae.pdfIn PDF document text
    • https://kudoxere.weebly.com/uploads/1/3/4/5/134591480/5c50e0c731c903.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/5008491.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/3923bf.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/nidawavo.pdfIn PDF document text
    • https://nizodori.weebly.com/uploads/1/3/4/0/134000204/xotivos_ditijaxosufow_zalisod.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/maviketiximitog.pdfIn PDF document text
    • https://milikosepawina.weebly.com/uploads/1/3/2/6/132696406/pekizolexiguto.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/nomad-kofunodofuw-zixuxuv-vaxobuso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001243f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243F 5736 bytes
SHA-256: 386aa79b3ddd2c75b9b093ad899eef2c84b319abd06b45b5423acaa92d51a672
font_01_sfnt_off000137af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AF 10940 bytes
SHA-256: e662938b17ea3f1a596d4fae616c113a7f84282fd4c78d84d10bd4ce705d0db0

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