Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d56aa893711030…

MALICIOUS

PDF

71.2 KB Created: 2020-12-19 16:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8b76d4da6092f647dd31910bf70bdbba SHA-1: ed58890eb84a8a41097a67c25ccd29b383a7a067 SHA-256: 55d56aa89371103098440b7381a48fa87670d239acf462ff4f890c88c0f8dbca
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one pointing to a suspicious URL related to 'trafffi.ru'. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or SEO link farming. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect users to malicious websites.

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/strik?utm_term=proform+520x+treadmill+price PDF link annotation
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/3de853f2155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f973b888ffc4.pdfIn PDF document text
    • https://rufogeror.weebly.com/uploads/1/3/4/6/134664275/298540280dcc76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf659afa04221c71184ab9/1606378906837/rifupeminez.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/2007_mazdaspeed_3_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/smart_phonics_1_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77a6e791da6493f6a9a22/t/5fcd6b4e260a660a6beeed79/1607297870733/best_sad_ringtone_download_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/82398006163.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18b2c68612547ed62b026/t/5fc3166b173fb5383b0900c1/1606620780217/oh_my_girl_arin_body.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ccd688c99b6d37b395bd/t/5fc8a31bf97c193540f4aba9/1606984476530/47112412576.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/kasumixuxeg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc7c2370623334b0c6d00bf/1606926904180/wings_and_things_pompano_hours.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c877848ba205d1c3861/t/5fc7b5f21d689b68bfa5781d/1606923762451/business_international_group_llc.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/44372530259.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19ab11452f90b7fea4d21/t/5fc677623485235c86a683e8/1606842210435/48883134519.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC063 5592 bytes
SHA-256: 595ed9ec48cc889e120c2e530762831b99048ee2ee3f3f7e781f989845ccfa37
font_01_sfnt_off0000d35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35E 11544 bytes
SHA-256: 1ea41a2c8b6c4245b8574fe6cd4373fbf80b3701126834ddd60af2a6bc9a18b7
font_02_sfnt_off0000fab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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