Malicious PDF — malware analysis report

Static analysis result for SHA-256 471e52acd55b1d9f…

MALICIOUS

PDF

92.5 KB Created: 2021-03-09 18:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ee3a013a5fcf136c6788fd34349095be SHA-1: 0c1c8452c7448ac4c6e324602001c3019f1948ad SHA-256: 471e52acd55b1d9f3035d10eb48ec07fa79fe51b25e3c538315a13b14d1c4cf3
236 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a mass external PDF link farm and lures the user with instructions to copy/paste content into a shell, indicating an attempt to bypass security controls and execute a second-stage payload. The presence of multiple external URLs suggests a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kuzutuzo.ru/123?utm_term=volunteer+at++festival PDF link annotation
    • http://glossywp.online/85311510046lisu8.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/1902913.pdfIn PDF document text
    • http://rollernefritmassage.xyz/812789328784zemq.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/ifjbhcs/motorcycles_for_sale_by_owner_craigslist_oklahoma.pdfIn PDF document text
    • https://tupewolukup.weebly.com/uploads/1/3/0/8/130813866/mebezarep-tovax-vimibakirubi-kesebewagisuk.pdfIn PDF document text
    • https://danabemove.weebly.com/uploads/1/3/0/7/130776083/79ebe9bb274d4b.pdfIn PDF document text
    • https://sorefumegevori.weebly.com/uploads/1/3/1/8/131871670/bijifup.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/3c7dc7185e.pdfIn PDF document text
    • https://xulibaro.weebly.com/uploads/1/3/4/0/134041525/nidipaj.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/AccbihZ/60768391373.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/f3fdf02ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/tamil_dubbed_hollywood_movies_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/smile_it_will_be_ok_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/zigolukolaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/58895622791.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/facebook_video_calling_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/turugudurepef.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/24186066498.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/wotamipokonanigopep.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3F 4788 bytes
SHA-256: 51b205a66f6277cf8151eeef248b85e35806cbb4150b9ccdb0eac294249ad368
font_01_sfnt_off00013f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9F 10940 bytes
SHA-256: 7097750b5d0045954562a01ad06b2e521f644f7a108861eb341d23efa2ef5aa8

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