Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a31cf34185f16a…

MALICIOUS

PDF

74.9 KB Created: 2020-11-27 09:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f4e339d753d459451ac50d74ccd8bf SHA-1: 1e2beb437603e5e8c330bfb2b0a07cba015d6c2d SHA-256: 64a31cf34185f16a7d2487a7de8bed2bd9f64ca0600ebb923f57af03c6966371
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as part of a link farm or malicious redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=manual+for+lg+tribute+hd+ls676
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/d12b22.pdf
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/megopipedi-kekewubu-zipepune-sixerobev.pdf
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/sopuxote.pdf
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/2335882.pdf
    • https://xubupibef.weebly.com/uploads/1/3/4/7/134742940/9d2d06f4f75f6.pdf
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/e54ee.pdf
    • https://winuvepesedop.weebly.com/uploads/1/3/4/4/134476249/646901737d649.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xelob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41c42488-690d-427e-a6bc-e86427dbbb1c/43380086817.pdf
    • https://uploads.strikinglycdn.com/files/2efb4239-9b6f-4383-8a6c-bf5864a1fe32/24321018601.pdf
    • https://uploads.strikinglycdn.com/files/ea8ee578-bdb3-437f-93b3-db8bea3d6190/39041323087.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/xotojafa.pdf
    • https://uploads.strikinglycdn.com/files/b8337e84-3804-47c2-9ce6-09060ada2ebe/57731831426.pdf
    • https://uploads.strikinglycdn.com/files/1d59a714-4c5e-4082-8160-faf3fcb9e22f/kebelomitazilukagelepob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d189.bin
b64350c7bbdab9a8dc064f21a0594747627629593141b2bb6cd02da97e11ebda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD189 3724 bytes
font_01_sfnt_off0000dec7.bin
499f931780878e1803a7e46b60c190a7323a4a63de871f0622e370cfc06a014b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 5548 bytes
font_02_sfnt_off0000f1b3.bin
334ad819eb016757ceb49cdce9f5f9c06279283e5dd62572f0cdf4a814c22400		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 14348 bytes

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