Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf56c7112798cfe1…

MALICIOUS

PDF

99.7 KB Created: 2021-01-12 11:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7048a082cb76a00a7ee56d4ae145640c SHA-1: d27e924154199c65fc5d8d5d0c0b2e84ebdc9a60 SHA-256: bf56c7112798cfe1b3e53e2539d05ca949fa8877a4d9aca6aba1798aa49b5440
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a "Chitra film kannada song". The presence of multiple external PDF links suggests an attempt to distribute further malicious content or engage in SEO link farming.

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 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.
  • 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/aws?utm_term=chitra+film+kannada+song In PDF document text
    • https://site-1195605.mozfiles.com/files/1195605/stickman_ski_racer_apk.pdfIn PDF document text
    • https://nitogufufuwal.weebly.com/uploads/1/3/3/9/133997090/reneze_rewipid_musalaxun_feluwodoxakuwu.pdfIn PDF document text
    • https://jedogivezuse.weebly.com/uploads/1/3/4/8/134862252/9ab5b4a0456.pdfIn PDF document text
    • https://pikotefomulig.weebly.com/uploads/1/3/4/3/134317367/4344525.pdfIn PDF document text
    • https://site-1175669.mozfiles.com/files/1175669/9322751503.pdfIn PDF document text
    • https://vizadatu.weebly.com/uploads/1/3/0/9/130969858/lekatumis.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/HnqNjgK/sotipob.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/79229396632.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/57180450958.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/zujef.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/dark_wallpaper_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/22385172450.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/marej.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001397d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1397D 2164 bytes
SHA-256: 886f6d3ddec349880baae06bf7b4875b29a2d2e5e5a9a4b369300c49f41aba00
font_00_sfnt_off000127b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B2 5288 bytes
SHA-256: 314bd7fb843ae40a3c06bd2794f96f610ecdc370fbb26320004a617cb640fcce
font_02_sfnt_off00014399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14399 6976 bytes
SHA-256: 65f9caa7a582e0c6bde00b7fde7cace091e8c85dfe50ee31c72e6717bb3d8195
font_03_sfnt_off00015a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A32 11416 bytes
SHA-256: 8a489b5646abf58b3932dd254bc546d89a67b1ff14452fc23e876ffc51bca585

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