Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae45793a59fc973…

MALICIOUS

PDF

85.3 KB Created: 2021-02-18 06:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 62312a6f0af97c40e4a0054147c5746f SHA-1: 48d513811dead522d4ab1d1657e4b792639f697f SHA-256: 4ae45793a59fc973d6cfa85f14f47357da41a7e484cb2ce785089cda30a2c4a0
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, many of which point to Weebly and other free hosting services, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=roblox+esper+online+codes PDF link annotation
    • https://labajamipudoxa.weebly.com/uploads/1/3/5/3/135399896/rodopeku_tugerosew.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/BxL1hit/pabusekiro.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/wusuwomamofadeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/hjHhdhg/vukoladatasomusar.pdfIn PDF document text
    • https://vogexuluvudo.weebly.com/uploads/1/3/2/6/132695782/086fcf907158.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/bevarolimesale/android_music_files.pdfIn PDF document text
    • http://nekezoxugi.rf.gd/asme_welding_code.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/31317156508.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/audio_naat_hasbi_rabbi.pdfIn PDF document text
    • http://keximidurowu.rf.gd/57242265436.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/smd_capacitor_codes.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_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 4780 bytes
SHA-256: cc4505103f81f896017e89c7393505f2403a3ff2aa2b2470bff7356fcd519edf
font_01_sfnt_off0001168c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168C 10420 bytes
SHA-256: 9a23cf35f57a75e078b9738c1d09a0c1420779e233f084d3834cd373e21a9959
font_02_sfnt_off00013a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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