Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b11145d56882e8…

MALICIOUS

PDF

78.5 KB Created: 2021-03-22 05:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 83b0bedd77af3e3331e5734c2e5d8d60 SHA-1: 23dc090eb8122d72961c001e735eee30022604d3 SHA-256: 29b11145d56882e86f0ec636b67ef8119f1b17cbaf8f3375fe7014cc5ac2041b
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-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://kuzutuzo.ru/123?utm_term=doj+sec+fcpa+resource+guide PDF link annotation
    • http://helplnstagramcontact6088758.com/35306506569752nn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fca03bf487a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_6039989eb2a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_6019c692be76d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458428/normal_5fffe931a8c43.pdfIn PDF document text
    • http://interbankdigital.com/sharper_image_ionic_breeze_gp_s1730qzrto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372087/normal_6004d5be92b5d.pdfIn PDF document text
    • http://wusokamojifel.scienceontheweb.net/what_order_to_kill_bosses_in_dark_souls.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/19cf299e-a5a2-42cd-bc8e-9eb3852af517/73582365268.pdfIn PDF document text
    • http://gajewokutonixa.rf.gd/87186015704.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/84525520203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232cbef9-71a9-4b49-8ff7-2ca6f420c9f9/rival_ice_cream_maker_parts_model_8605.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/wopunonofejudiwidutuz.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/synonym_worksheet_for_3rd_graders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc29bb46-9e3b-4a47-b0d4-e839ed7301b3/how_powerful_is_homelanders_son.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/javutorewuwatoluxogizik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba3a566-10d7-46c1-9807-e6dced691536/16147915211.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/87065400289.pdfIn PDF document text
    • http://lagiwugakit.rf.gd/47662181244.pdfIn PDF document text
    • http://nimuwoke.epizy.com/10529648306.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/directsoft_6_keygen.pdfIn PDF document text
    • http://zelagipu.rf.gd/bribery_and_corruption_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/wikopuvijuvikomilezewas.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_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 5364 bytes
SHA-256: b5adf3c60a5dceea173e267e642045e1538dc9e1047bac1267b5d7e34bcce12a
font_01_sfnt_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 11216 bytes
SHA-256: 1e6246b616eefdef4ad59f056b4ff138592847e1097ce0122244459a94ed1d62

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