Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8702da4bef5dcc…

MALICIOUS

PDF

88.9 KB Created: 2021-03-30 09:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5e5d467b6c72dc64bdedee00ae637be5 SHA-1: 3c67bcfd646412eabf4f9d344d62969852d4a63e SHA-256: 0e8702da4bef5dcc240a75989c181326c822272d98ee66dd7cdf08f767a43566
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to other PDF documents. The ML classifier and ClamAV also identified it as malicious. The primary purpose appears to be directing users to a collection of potentially malicious or SEO-manipulated content hosted across various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://fokemale.ru/award?keyword=speed+velocity+and+acceleration+problems+worksheet+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/wikaraxixi/ds4zcii/disney_zombies_2_party_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_6058427d4a714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_5fe4a66fd55b8.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/ftcvhim/69779776822.pdfIn PDF document text
    • https://nogalagamepet.weebly.com/uploads/1/3/0/7/130738620/9dca9ec51d1cc9.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/gcjahch/best_spam_call_blocker_for_iphone.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/982425053683iauo.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/ihhcW7Y/b_k_s_iyengar_books.pdfIn PDF document text
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/toxujaso_pidikupenefa_remiwiwokoxa_biwirilaleres.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/bdjgVhw/58743897590.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/phiifhf/turoxokexidutakitofuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_605546548edbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5ff14af8a0dea.pdfIn PDF document text
    • https://cdn.sqhk.co/dobopejig/b3Nifih/wars_mobile_world_war_2.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/hhihMmj/lethal_weapon_3_imdb.pdfIn PDF document text
    • http://bigops.fun/69090624039uu2kb.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/5a1b02c2-8bae-45e5-8925-46e3f56e8a64/bojack_horseman_screenplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5880f807-de19-4f5c-a74e-f7a5beaa9106/the_book_thief_important_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913a6ab0-b612-4aec-8474-20db990959d8/real_estate_agent_schooling_required.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f63f28d-b93e-4a08-99b8-7d92d5175d9d/theological_dictionary_of_the_old_testament_botterweck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51c190f-f430-44be-a963-97208b98ee84/how_to_get_my_forklift_license_near_me.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_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 5476 bytes
SHA-256: d79e8d9b0eeece4fc2ed0ddeec37336ad563325afb14e730ba8557b84fc5a020
font_01_sfnt_off000115b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 5956 bytes
SHA-256: 5c1c77e3f0297038c8da40592dee192bbb8bc514f57dd25e8065889c7421ef30
font_02_sfnt_off000129f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F0 13036 bytes
SHA-256: 7d34fad03f0cf1f4bd70b6ae1e8e11f5b0862c1b1189c2b7891139b7c2e31e9c