Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5fa13a2ebf364b…

MALICIOUS

PDF

102.0 KB Created: 2021-02-21 13:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5c477fcac5f812383220e984b736ef02 SHA-1: 51d0c6fd04c03f7089648b49e47c7c54f89ac514 SHA-256: fd5fa13a2ebf364bc5765382bcc6d2c851592bdbe3c3890f8d168d040b29df15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for a link farm, suggesting it is designed to redirect users to multiple external sites. The embedded URL 'https://jacksth.ru/strik?utm_term=find+medicaid+providers+in+michigan' and the presence of a large number of external PDF links indicate a phishing or SEO poisoning attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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://jacksth.ru/strik?utm_term=find+medicaid+providers+in+michigan PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370087/normal_5ff674c653d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_5fd0bbcae0b5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368977/normal_5fe1c275e62c0.pdfIn PDF document text
    • http://xifotole.iblogger.org/96557783300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450889/normal_5ff2482ab74d3.pdfIn PDF document text
    • http://guworumitikizu.iblogger.org/povosazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5ff27982586c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fcc7e22b7f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_600d5e3a2f9d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_6017a6ae661e7.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/wivanobi.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://vedebimefawimad.rf.gd/zoxase.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/kossan_paint_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/bnp_paribas_london_branch_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/21668768106.pdfIn PDF document text
    • http://wamebebubo.rf.gd/naruto_run_game.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/83530855964.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/oc_bold_typeface_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/bedwars_map_mcpe.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/pdf_splitter_macos.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/8032840422.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_off00014442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14442 5176 bytes
SHA-256: 00cd258cae13c1fce6646874bd005f219471574dffca9b4bf90689db1f96892c
font_01_sfnt_off00015597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15597 11596 bytes
SHA-256: dff6c0c8802fddcc9085560bce7f86007763ac379a09269311c658b86c8575bd
font_02_sfnt_off00017b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B97 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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