Malicious PDF — malware analysis report

Static analysis result for SHA-256 946c3694733f085e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 21:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7075acd426765a39e4856397fa40aa3a SHA-1: d7477f73320c56419db8a72707fc041e9c5e3e4b SHA-256: 946c3694733f085e0a0aaaab5ccd178aba1bc1357496619edd47d5c2905ebd73
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 0.9998

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://pelibifir.ru/wix?keyword=witch+slap+th9+without+bowlers PDF link annotation
    • https://pofofeteb.weebly.com/uploads/1/3/2/6/132681268/junevugigu.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/hdgjMgF/basketball_game_length_nba.pdfIn PDF document text
    • http://6gusevshop.space/753518370095ox19.pdfIn PDF document text
    • https://tozuriko.weebly.com/uploads/1/3/1/4/131437247/5029398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_604ca1d64d4e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ffa9c58e2c1d.pdfIn PDF document text
    • https://mipafalubered.weebly.com/uploads/1/3/4/0/134017716/647768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477877/normal_601ca1ed348b5.pdfIn PDF document text
    • https://bunemanedadon.weebly.com/uploads/1/3/4/4/134476229/dinifeg.pdfIn PDF document text
    • http://paksorond.xyz/logiwapi8ezyn.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/iiiigMf/identity_v_characters_wikipedia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/84e0ec1c-bc2f-434d-8c07-6a7965a202b2/how_to_make_career_in_cloud_security.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134bab5f-ec64-4268-803d-b6b47cb81d47/how_to_program_a_craftsman_garage_door_opener_remote_315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4aa9e26-d5b2-431c-9ee8-72edf531bb4f/1663187173.pdfIn PDF document text
    • http://zopiselewanut.epizy.com/1057577834.pdfIn PDF document text
    • http://vofefigekoloru.epizy.com/dukitolexi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 5200 bytes
SHA-256: 2f36c2fbf20cf282c0a734106932d51f903a67a23c8f74ea58f6960eacef542c
font_01_sfnt_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 10832 bytes
SHA-256: 0658274a64740a93e81e79b8cee9bd20be440f84a837ce5f1b6f30817f9cdd37
font_02_sfnt_off000114e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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