Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ec09743334eda4…

MALICIOUS

PDF

96.4 KB Created: 2021-03-28 19:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1f429cb40c17c1748f8e7b98786f24f7 SHA-1: 5236a3c2a15e8e0a16054a5c2ec466e15a3ac927 SHA-256: e7ec09743334eda40dbefbd46eec7bc5804f2fe374335547a89c90660afe88ea
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 0.9994

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://druttle.ru/award?keyword=monosacaridos+libros+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454043/normal_605f9b16498a9.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/jujufij_kepomeruwem.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/ghhjgmY/wastickerapps_you_i_couple_love_stickers.pdfIn PDF document text
    • http://filemarker.store/what_is_the_50_shades_of_grey_about6qahv.pdfIn PDF document text
    • http://b0xberry.online/46824599742gmhfo.pdfIn PDF document text
    • http://amsidgi.xyz/dragon_quest_builders_2_farming_guideqthq2.pdfIn PDF document text
    • http://magicwoolshop.com/sonny_s_pasta_san_clemente0mszk.pdfIn PDF document text
    • http://jumbochecker.com/football_manager_2018_apk_androidwv7gc.pdfIn PDF document text
    • https://jiranunurojowoz.weebly.com/uploads/1/3/1/8/131860868/novare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5ff3021fd129d.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/44447335541fmgu9.pdfIn PDF document text
    • http://legalvictory.group/gutivup9bz3.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/ggcia4V/muscle_car_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417119/normal_5ff07e876f40e.pdfIn PDF document text
    • http://rulazix.iblogger.org/rosario_para_difuntos_con_letanas.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/rhcdqjT/file_manager_2._0._9_premium_apk.pdfIn PDF document text
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/7650064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_60364b9eb0e7a.pdfIn PDF document text
    • http://zalavsky.ru/atwood_rv_furnace_manual_8531ugbja.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
    • http://zijilevigapoxo.epizy.com/sufudemuwuwuxolitowofolok.pdfIn PDF document text
    • http://jazovojekil.rf.gd/nisizironotibukozafeni.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/super_mario_bros_2_guide.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_off00012ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE6 4884 bytes
SHA-256: d143b51849714f225d97b36dafc7b0c89f08354283cc416a633f20889c682a90
font_01_sfnt_off00013f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F74 11644 bytes
SHA-256: 1db0c60532c469ef80cb3d0736510978f9dfdfad12e6a659d718bfc175702367
font_02_sfnt_off00016549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16549 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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