Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3bbc5ea1a36f7a…

MALICIOUS

PDF

70.2 KB Created: 2021-04-05 09:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88a3133f4a99abcf6032995a8f5ad8ae SHA-1: 9007d5d61948f92a2d7edd4bf0740520665926ba SHA-256: ac3bbc5ea1a36f7ad64d0a6dbd4ce310a39d62f7529cc9e30a9e0bcb74d44703
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://lozipotod.ru/wix?keyword=toro+lawn+master+manual PDF link annotation
    • http://niwanusunig.22web.org/administrative_management.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382639/normal_5fe439ac9a795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5fe8ff6433749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_604d27089dc62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_6017db4384e8a.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/hfVidig/garden_balls_bird_repellent.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd32912ac3bd.pdfIn PDF document text
    • http://xotiluzop.22web.org/9971698926.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/cgh2hf8/citrus_white_leather_platform_wedges_steve_madden.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawatelobuj.rf.gd/52792321550.pdfIn PDF document text
    • http://sisawujeza.rf.gd/jolexubadewadi.pdfIn PDF document text
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_0065f485c96d43628a3c9a3c6e44de86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/91646890503.pdfIn PDF document text
    • http://gujalitez.epizy.com/amped_wireless_sr10000_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/mackie_profx22v2_22-channel_mixer.pdfIn PDF document text
    • http://gejulakan.epizy.com/velebovopotixozekuj.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_60d847c676fc4144b5026b203b351a12.pdf?index=trueIn PDF document text
    • http://wikimenuvebiz.epizy.com/blood_sweat_and_tears_english_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/sozorevurivepovaxawi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/animal_farm_flag_quote.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_4090895d994549f09bbe6b36ed8189b0.pdf?index=trueIn 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_off0000d462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD462 4872 bytes
SHA-256: 7cae841bf88cea08da03b931121c69100088a4a253fb6b05c9a968c92e90b709
font_01_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 10892 bytes
SHA-256: b266f9b9ac5909b4eb23b06c07fcad9afb8c2a2037c0dc22bcc37a7369d8a5c1

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