Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff94247e62a45ad8…

MALICIOUS

PDF

118.6 KB Created: 2021-02-15 09:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c8ff48d956fcca3d2603d9ae9e7576c0 SHA-1: 44a28fc06cb971cd69956deab1c470ac3f40d12e SHA-256: ff94247e62a45ad85c40e0594dda9976a1c3440eca74fef96fe81d29747d3ed9
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ClamAV as malicious. The embedded URLs, such as https://jottigo.ru/aws?utm_term=asterisk+wait_for_answer+unable+to+write+frametype+2, suggest a phishing or malware distribution attempt. The presence of PDF_URI and PDF_SEO_LINK_FARM heuristics indicates the document's primary function is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8822

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
  • 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
  • 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://jottigo.ru/aws?utm_term=asterisk+wait_for_answer+unable+to+write+frametype+2 PDF link annotation
    • https://cdn.sqhk.co/takodabu/jbD4ajc/fipofesuzutatiwimuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/AieMghU/32119928820.pdfIn PDF document text
    • https://cdn.sqhk.co/zifibikom/ghicbjg/29590078613.pdfIn PDF document text
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/6896195.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/cWfjghb/warhammer_quest_2_ios_hack.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/2112277.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/hijjThc/makizajonugudid.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/ajaGfgd/buvidafurejod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fed36ddedcf6.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/jazEqij/28255976490.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/zepifudoxapo/28514707511.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/fallout_3_mods_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/22077671204.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8FE 5596 bytes
SHA-256: faa9922a7cf19cdc352e299b57b7cf8513a74f22b23bfbe8c33a99b23ca63ffb

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