Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9f6de7cb282f11…

MALICIOUS

PDF

81.2 KB Created: 2021-03-15 20:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: bcfed61c1b59c26be4d81d436452123b SHA-1: 02d306ae69f6bafb8a5b8ccf58abcd4666c479a5 SHA-256: ba9f6de7cb282f1196ecec77fe42936907db94560fc02d6089d007038e1df3b3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=chie+social+link+questions PDF link annotation
    • http://wegansit.space/appeasement_before_world_war_2_answer_keyfkumo.pdfIn PDF document text
    • http://dudipoviju.22web.org/codycross_answers_group_4_puzzle_4.pdfIn PDF document text
    • http://getsol.xyz/wilderness_first_aid_kit_amazonrr8yz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491159/normal_5fe3e47dab097.pdfIn PDF document text
    • http://all-casino.xyz/423812929748lmno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492892/normal_60173cb16c70b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fd9aafe7fa6d.pdfIn PDF document text
    • http://bigpleasure.ru/42718806722ipx0r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_6030ee8cd3620.pdfIn PDF document text
    • http://znakomstva69.space/how_to_light_a_jandy_pool_heaterser7t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461525/normal_6047774cb9404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/ansible_package_for_rhel_7.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_ba1ccc8c8f2a4fd1bc337939238efcf6.pdf?index=trueIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_28edc36176e34aada5b7f5505012876b.pdf?index=trueIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_4f5fa715d6544314aab2e877a8e938a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/battlenet_stuck_at_initializing.pdfIn PDF document text
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_e45ee1e8705c4c0ab89b052d9846b53c.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_afe931c29c5e4e9a8754cac7127079ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/62140455764.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/the_skillful_huntsman_book.pdfIn PDF document text
    • http://sijujoxavenede.rf.gd/fesakerizikazagaxuvafefax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA88 4888 bytes
SHA-256: d4a7f26db1bb5113bebf3d5d1fea2a378014a1f01eaf9a456f38ee18b339d276
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 11024 bytes
SHA-256: 38632fd6eaa9309cffbfe259a8e4f83703c668e14ff22eed9719e74ba2c03773
font_02_sfnt_off00012122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12122 16348 bytes
SHA-256: 7ea4ad8fabf58a022be5f422cdf71e1d18c834a5727f5ba12988ec6015bab3a1

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