Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d82bce7713a779d…

MALICIOUS

PDF

121.7 KB Created: 2020-12-17 23:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 429037b35a3e90bab09b8e36b25f53f7 SHA-1: bc8e29cfcf113ac3205c7b9a2040f066e558f1f7 SHA-256: 7d82bce7713a779d7eeaf7bbcfa06fc30f50523889e41342004c69231881826b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly and other hosting services, suggesting a link farm or SEO abuse tactic. One of the primary URLs extracted is https://trafffi.ru/123, which is likely used to redirect users to malicious content or phishing pages. The presence of embedded PDF links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=okami+san+and+her+seven+companions PDF link annotation
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/jopov.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/7126345.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/0e336.pdfIn PDF document text
    • https://xukabasal.weebly.com/uploads/1/3/0/7/130776322/rugetijafasaru-pogezudi-tamegemepuki-niwazexirekibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5fa61d6fb2666.pdfIn PDF document text
    • https://mefusinumobidal.weebly.com/uploads/1/3/4/6/134679396/toxijofabar.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/1192104.pdfIn PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/0edbcd6a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5fa8da11a1600.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/109e8ca1-4026-4004-a910-e90bcd733930/50474191851.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc011b424b06a7eb3fa7d30/t/5fc2167908845d0924d20f5b/1606555258078/bokuwor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef34ea8e-3893-4ceb-a966-72e3483d472a/27488600144.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fc138b2a97599144e23e122/1606498482409/34207468476.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc298b02bbd7406581167d1/t/5fc585def8cdb769c6a01ac0/1606780383675/tok_essay_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a5fdf9866f3fd2f44310/t/5fc9786dab0d1a26d95ed6f3/1607039085333/rainbow_unicorn_cake_recipe_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5451ac30a162e0c6f580a/t/5fcc037a3ff1011540dcccb9/1607205755328/atif_aslam_songs_old.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/26503826057.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/jiniletipekikolabefuwuk.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_off00012523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 39740 bytes
SHA-256: b6b874f7a305cc74730d7f7b76fc2e39fc86cdb3114dab5949f1e6588df5ec67
font_01_sfnt_off0001a003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A003 5432 bytes
SHA-256: 23ee337b7c86540b8237cd8ee1701571839a42ec952ad075cc2c8335c5e658cb
font_02_sfnt_off0001b25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B25C 11748 bytes
SHA-256: 2478439391fedc65314da16dd01854473e1d798c4167850322a74323dcf49de4

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