Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ece06c24d5932e…

MALICIOUS

PDF

87.7 KB Created: 2021-02-15 11:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 56c7eb4b7293ec0a9a0693028be524cc SHA-1: b4b340a2c93e79ad8d8c1d64cde5e41e33439603 SHA-256: a0ece06c24d5932e2de1684a11fb6cf524dd79173ca87acf539df1ad1a9fabf5
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirector infrastructure and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://yafferge.ru/strik?utm_term=hp+7610+printer+price+in+pakistan In PDF document text
    • http://erogan-columbia.site/hermitage_museum_guidebooko9s6n.pdfIn PDF document text
    • http://bullbananavannaone.xyz/414748907789b4d0.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/pepavaojk07.pdfIn PDF document text
    • http://podarokinsta.site/xezobigawab5fv1k.pdfIn PDF document text
    • http://mnatural.space/dajutumiguxijipy0rfr.pdfIn PDF document text
    • http://avit0.cc/807057011717ynk9.pdfIn PDF document text
    • http://coolstudent.space/above_all_chords_key_of_am5s45.pdfIn PDF document text
    • http://successinyourlif.website/bosch_spark_plugs_cataloguea659k.pdfIn PDF document text
    • http://goloszauniver.fun/56062822464qrn6e.pdfIn PDF document text
    • http://namelesssouth.xyz/gameboy_emulator_apke1oqu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376369/normal_5fef3c2bee3ad.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/fivenad1ifq.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/wiersbe_be_series_free_download7syo1.pdfIn PDF document text
    • http://meetchat.space/24951218086q2skr.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
    • https://s3.amazonaws.com/zonivezada/34325163595.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_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 5024 bytes
SHA-256: a7be694ffb3e48f5f6f5e30f408bcda0510ca01ca4621f39bb2ad5e1dbcd801d
font_01_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 11812 bytes
SHA-256: 1639042d8e274c2c240c6d20e29fca6b77e8b67fe5ff805325a5159fc9987210
font_02_sfnt_off00014375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14375 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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