Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcae1bb60c1555fe…

MALICIOUS

PDF

162.3 KB Created: 2021-04-24 16:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ba5fcd694d9cef822db880f5e4bb8fc3 SHA-1: df36b2872481e141f96a8c4a61a333c37fba2539 SHA-256: bcae1bb60c1555feedc3d48920e091568834c4a124c0a173f863653d5d48ee6b
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 0.9996

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=macbeth+act+5+scene+4+key+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454984/normal_6067197c1966d.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/puboriwukikuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_6022f5601da62.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/512af4e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_606b964a9d69c.pdfIn PDF document text
    • https://geguwuwivoloko.weebly.com/uploads/1/3/1/6/131636947/4694061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_600d5c5394b38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443617/normal_60469533bb5d9.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/70392317903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_606296799d571.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/3b0ffba6.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/leduwa-guzozosezage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitujiduruv.myartsonline.com/75528996484.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/after_2_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15dea9b-9f7b-4729-9fa1-a6078918d825/muxotib.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/breaking_bad_english_subtitles_for_spanish_parts.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/widavokukef.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/how_much_do_autozone_managers_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2741b3cd-8e37-4f73-a22a-103698469376/mfc_7360n_replace_drum_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/why_is_my_hoover_carpet_cleaner_not_suctioning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb643840-02b4-4df6-b868-71352c1f9d27/watson_j._strategy_an_introduction_to_game_theory_2013.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002450a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2450A 5408 bytes
SHA-256: c216b6d37fcfe6ff34f269405218085389d5427999e78318d6c7ad641b8ae183
font_01_sfnt_off00025794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25794 10528 bytes
SHA-256: d9aa8ea586564620579ede00de2af32285aeee4b52af35fead3f4c5eaf75957e

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