Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb282e1424674fb…

MALICIOUS

PDF

81.7 KB Created: 2021-04-07 07:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5881cbf2b097aa21356bee8e7883e6de SHA-1: cd75e649e229ff3a9fb9ffa94ad05d8d84f17fe3 SHA-256: 8eb282e1424674fba0a4d071d3fa46e7a4051b1877008d428fffaa56f3259049
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 0.9994

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://jottigo.ru/123?utm_term=thyristor+datasheet+pdf PDF link annotation
    • http://tublitalia.fun/64573871375i9m9n.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/hchdspS/cute_cartoon_love_stories.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/af2da06fa7bd3b.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/h1jbhjQ/kowuwijon.pdfIn PDF document text
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/lapar.pdfIn PDF document text
    • http://demask.space/874447161095cnwe.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/c0fKjjl/lakidopemuwejibepip.pdfIn PDF document text
    • https://lulaxakopoto.weebly.com/uploads/1/3/4/3/134331182/wiwenivuwen.pdfIn PDF document text
    • http://studyweb.site/7723882320303flq.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/fibEYoL/nails_for_you_210.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/dGhijcv/block_puzzle_jewel_legend_pc.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/920790.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/xisajemeparorirona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_b6c14efbba004c5580c821b2246bcb96.pdf?index=trueIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_fa14b27bc28248e089d5566d891916aa.pdf?index=trueIn PDF document text
    • http://kovudefimure.rf.gd/giorno_s_theme_piano_easy_sheet_music.pdfIn PDF document text
    • http://tadukaxuzevida.epizy.com/wedolefegotogenu.pdfIn PDF document text
    • http://sakonolib.rf.gd/pedenopuzopoxetegizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48162e51-d11e-44f4-93a5-9e4b4b7ee07d/lepoful.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_10dccbab876f4acaa2ce972fee123245.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da74e690-7aa9-434f-aa58-340e8482465d/imovie_11_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6f690e-95fa-4c3b-b1f9-5ee14f7d984f/woritorok.pdfIn PDF document text
    • http://vapepojova.epizy.com/arpav_dolomiti_meteo.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_off0001025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 5148 bytes
SHA-256: 689b3434965825a8ee99c3f186d92267942c3a0de72ce45cd8c01330a5f0df8c
font_01_sfnt_off000113de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 10628 bytes
SHA-256: 4947c764f26d4b0a9918e7c103228f47c4dc39bd820193349929d1d881926a71

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