Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e919016fce444c…

MALICIOUS

PDF

64.5 KB Created: 2021-02-20 03:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 58ca09f6a170db6e12d04a20d78c2135 SHA-1: c04723f8255d8f36b84477db04d75aa820094304 SHA-256: 65e919016fce444c8420a8fe4bd949b3062f78969ebf7875d0b4bc911ea01cb7
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=snaptube+premium+apk+mirror'. This URL is presented as a download for 'snaptube premium apk mirror', indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/wix?keyword=snaptube+premium+apk+mirror In PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/U4XZgjz/love_letters_to_kellie_cheating.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_60095f40a05de.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/ghhjbib/50399946455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_603041d18fbfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462368/normal_600725052cb36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fe6ec9534b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_6010af298659d.pdfIn PDF document text
    • https://cdn.sqhk.co/parapirer/5PKyjeM/farming_simulator_14_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/aol3ibX/60348395848.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/gifiz/championship_manager_2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/97643282058.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/73568303023.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/training_completion_certificates_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/tofisem.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/adiabatic_process_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/pak_tv_world_channels_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC159 5064 bytes
SHA-256: 6f563b78864308fce5eb6954bcd404df3d9012d6356ae1ef47c451cc20b5087c
font_01_sfnt_off0000d279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD279 10120 bytes
SHA-256: c1317127fbf27273adf836174197f054f0bb40d8e216ba49688502b0d6fe2374

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