Malicious PDF — malware analysis report

Static analysis result for SHA-256 d387f615a5d59273…

MALICIOUS

PDF

104.6 KB Created: 2021-02-24 14:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fbb69481ed1252423403f69ca5dfb3d9 SHA-1: 9a6345a0286f194a990d07062c6952081d78d0e4 SHA-256: d387f615a5d5927331db378244d5004b4a6e6382c6dde97c259903b97fcfc665
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links pointing to various websites, many of which are hosted on disposable domains or known redirector infrastructure. The primary goal appears to be directing users to malicious sites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. While no scripts were extracted, the structure and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+long+is+jail+time+for+awol In PDF document text
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/5124653.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/gjHigCk/55962787846.pdfIn PDF document text
    • https://fogorito.weebly.com/uploads/1/3/5/3/135322632/9448625.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/17afeb048d.pdfIn PDF document text
    • http://furunow.iblogger.org/gravity_rush_remastered_ps4_trophy_guide.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/wifaxezo.pdfIn PDF document text
    • https://zitakutuseg.weebly.com/uploads/1/3/5/9/135994262/6873671.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/f1RpCgc/kisesovuwon.pdfIn PDF document text
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/mokosumuruzuleweri.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/d708848aad.pdfIn PDF document text
    • https://bawokotofebadu.weebly.com/uploads/1/3/4/5/134507933/157301818.pdfIn PDF document text
    • https://fuwurukuzubefek.weebly.com/uploads/1/3/0/9/130969433/5903519.pdfIn PDF document text
    • https://pezufefak.weebly.com/uploads/1/3/4/8/134865979/c7710354a213fc4.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/gilimebaza.pdfIn PDF document text
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/mokolidab_gululer.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/welanisowari/asphalt_street_storm_racing_game.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_off00014fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFF 3000 bytes
SHA-256: b482d22b722c394d84b00da9f8094d8dcee20b90f8113908b48d380abfb06400
font_01_sfnt_off00015ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB3 5216 bytes
SHA-256: acc4bde0e7aceda62dacb5d8e922d2f18f1481d4e0576438ebb006dbc4ce0964
font_02_sfnt_off00016c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C71 11888 bytes
SHA-256: 9f63fe66013f2a4d39fc009cc98d83ee22cfa0ab931a84f8bd5e994a7b69489d

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