Malicious PDF — malware analysis report

Static analysis result for SHA-256 0933c556487ac03e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-08 16:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b49a8491c637ff2d87c74928f1fd94a8 SHA-1: 917a173a97bc417d29dcbade6ddf7239d918bc27 SHA-256: 0933c556487ac03e0e67ec9863b9c23f6a64d0d81c9dfeb9d5bafebfa8c69340
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 0.9992

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=barbaro+definicion+pdf PDF link annotation
    • http://dalnoboyi.xyz/champion_dual_fuel_generator_9000_run_time4g832.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovukuvi/RJXghid/riwobelemeno.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/7617411.pdfIn PDF document text
    • https://cdn.sqhk.co/felibepudu/jgjifLI/bogozalinemakebawaso.pdfIn PDF document text
    • https://xofofafe.weebly.com/uploads/1/3/1/4/131438501/bulemafosa_lelaziro_pixovuv.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/uTngigc/88981174638.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/anatomy_and_physiology_of_the_human_eye.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/67086156798gb741.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/hbpjcgd/amazing_panda_runners.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/mixapisufoxitiwomovarotex.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/how_to_drain_kenmore_600_series_washer.pdfIn PDF document text
    • https://dalegoronatodul.weebly.com/uploads/1/3/4/3/134309481/be37954d91b.pdfIn PDF document text
    • http://mafuditovu.iblogger.org/33873195077.pdfIn PDF document text
    • https://rabibenexu.weebly.com/uploads/1/3/5/3/135319922/zejuvakupota.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/1db667a36f.pdfIn PDF document text
    • http://loleveze.iblogger.org/baba_please_answer_my_prayers.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/pgQObjc/color_flashlight_apple.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowegasobufur.myartsonline.com/4527457767.pdfIn PDF document text
    • http://xitanevakuzog.epizy.com/4827738355.pdfIn PDF document text
    • http://nupopejif.epizy.com/set_background_android_transparent.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/cover_letter_format_for_summer_internship.pdfIn PDF document text
    • http://webekilijonelew.epizy.com/64209454572.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/64809751489.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5128 bytes
SHA-256: 0ff886867e07b13939b652b946d1e0379d1161cfc58227386a19360608cb7aad
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 10560 bytes
SHA-256: deba640d96b855055c04c00d0636d6d9ced3fae01892b802a2d0d6e01191701c

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