Malicious PDF — malware analysis report

Static analysis result for SHA-256 624c2fdf71be101f…

MALICIOUS

PDF

71.4 KB Created: 2021-01-10 01:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f38ad668d062f2486e94655f17172cec SHA-1: 6f44cc0a4aa808a14dda6b9691a7c165992d0e0f SHA-256: 624c2fdf71be101f7b4a2bfa19cb5f1cca1b19b4a7b6c14e95cff311818a473a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to 'My cloud apple app', likely a lure to direct users to malicious sites.

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
  • 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.
  • 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://trafffe.ru/wb?keyword=my%20cloud%20apple%20app PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419441/normal_5fed0fe3cae74.pdfIn PDF document text
    • https://lefusavuforuv.weebly.com/uploads/1/3/4/4/134490278/b7b3c3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417418/normal_5fed182614c1b.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/9847291.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvezunotumu/5BlZBrH/88628807861.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/225984.pdfIn PDF document text
    • https://basisini.weebly.com/uploads/1/3/4/7/134775363/pukulebebobonuj.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/pexur_nanibalezit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fa5b1aa78817.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/JjbfWhi/8731380494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457604/normal_5fb5e6875a8b0.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/aa749948.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/l9hgPhf/hp_print_service_plugin_download_for_laptop.pdfIn PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/23de059.pdfIn PDF document text
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/af2dd8de56ec53.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/iDig9jc/who_conquered_the_aztec_and_inca_empires.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/383234.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://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_off0000cf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5B 4548 bytes
SHA-256: 439b5112af97a6b7772926b45a17ff86a891c2dba50c94b3fa0518f1353324d0
font_01_sfnt_off0000dee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 10460 bytes
SHA-256: 3034111d3a981db41152277eb1c1083aa8bffff314b79def6c5115a3f8b1ab4d
font_02_sfnt_off0001025f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.