Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba78f7747f8ac17…

MALICIOUS

PDF

68.4 KB Created: 2021-01-10 10:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: abd71e1dd8cd53d61567d07cbaf288b6 SHA-1: 94e257ecc780ba4b23dbd4581f1211795ef756c8 SHA-256: 5ba78f7747f8ac177ee610408734d579f12312b4508e5e8fe69a0549372d5f4a
206 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a callback lure heuristic indicates a potential phishing or scam attempt. While no scripts were explicitly extracted, the nature of the link farm and the phishing lure suggest it's designed to redirect users to malicious sites or engage them in a fraudulent scheme.

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/aws?utm_term=florida+llc+annual+report+requirements PDF link annotation
    • https://cdn.sqhk.co/zutijujes/jggjgcf/zerago.pdfIn PDF document text
    • https://mitiguranam.weebly.com/uploads/1/3/4/4/134456526/komubukidalum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5f94544e17afc.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/8625337.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/hihhcjf/dictionary_english_to_farsi_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/5VBz1Vl/acrylic_nail_designs_simple.pdfIn PDF document text
    • https://disemiseses.weebly.com/uploads/1/3/1/4/131407045/maxevoje-nawinelafuxapi.pdfIn PDF document text
    • https://teliwunamadawab.weebly.com/uploads/1/3/1/3/131381891/lipezilipitomaguj.pdfIn PDF document text
    • https://renevemepo.weebly.com/uploads/1/3/1/6/131606397/38efd387e7.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/haigcjc/world_war_heroes_ww2_shooter_apk_data_download.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/3191660.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/35b7764552.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/a61cfdb0538.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 5300 bytes
SHA-256: 1a5f0dd6e6b430dfbe8bbc945d0edfbef011d1fb80c38f01dc52659a6be5470b
font_01_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 10400 bytes
SHA-256: b4c950c40ce5bca6457a1d06fc13ada4afb7b73404890fa9e14c28ae42876f35