Malicious PDF — malware analysis report

Static analysis result for SHA-256 184badf0398460eb…

MALICIOUS

PDF

85.0 KB Created: 2021-04-08 22:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 528066b48ec44fe6387d86379aeb282d SHA-1: 566cc3c71710ab74ade21aaf9bbb79a9c5fc1d89 SHA-256: 184badf0398460eb04d7790d7559519f1e51e63c6e62b112e8ccead38b22d430
126 Risk Score

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 0.9910

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://lozipotod.ru/strik?utm_term=stephen+king+it+2019+trailer PDF link annotation
    • http://tiktokfrance.fun/how_to_reset_q_see_camerawvi2s.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/bbAZFNf/zibiliju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403672/normal_6001e8f24b3a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600a4fc0ac13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_60148122d3b05.pdfIn PDF document text
    • http://trynutra.shop/30923048659vq26a.pdfIn PDF document text
    • http://nicepics.xyz/39669981728q3dfi.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/iiiiXgg/wizikupobu.pdfIn PDF document text
    • http://expressday.online/database_administration_fundamentals_training_for_mta_exam_98-3644hsv5.pdfIn PDF document text
    • http://tabikola.online/12776448709j8qzi.pdfIn PDF document text
    • http://qlemelest.online/50427113626bgc7v.pdfIn PDF document text
    • http://mizarofu.22web.org/pujogumezegam.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/jjiexDw/brimstone_valorant_voice_actor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fe1fa2bdb2a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_600166da44920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_60583c60bc2ca.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/uEDicja/building_plan_approval_drawing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379969/normal_5fc663a2848f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_6056802477649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_6051cd71a9e00.pdfIn PDF document text
    • http://molotkov.site/detukifojasujogemeditaralqbsfv.pdfIn PDF document text
    • http://1green.space/24_ore.filma_me_titra_shqipvjm99.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/jahghbm/jikepatoxowupoka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478438/normal_5fcae53d2975c.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://kovawasokagi.epizy.com/66179604705.pdfIn PDF document text
    • http://regigaxuwejizu.epizy.com/17112608682.pdfIn PDF document text
    • http://mebulipamimena.rf.gd/phacoemulsification_cataract_surgery.pdfIn PDF document text
    • http://fimafogonew.epizy.com/nixerukexomemeroj.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_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 5232 bytes
SHA-256: a7d504298e70dc68217c41668e22a94528003e0a23e40555d9d6e67600ac17f2
font_01_sfnt_off000111b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B7 11500 bytes
SHA-256: 2cf8d4fc1f932a81224174ab4ac2f8f1a90d38815f111a0e664cdccd49c570ed
font_02_sfnt_off000137a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34