Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f3fa0fdf3b4a7e…

MALICIOUS

PDF

76.0 KB Created: 2020-11-28 18:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7d650dd8aaf167ad26152d4838d5e9c9 SHA-1: 169586ba8e8ea0eec4ff26ab811ef7c8bdd20d81 SHA-256: 37f3fa0fdf3b4a7eecd1b2a3c3b61bf96bde96afa8a635afeb5e31908a0f6d33
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffnew.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to search engine optimization or a fake search result.

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://traffnew.ru/strik?utm_term=briggs+and+stratton+spark+plug+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417327/normal_5fb2a63c52041.pdfIn PDF document text
    • https://nogenovone.weebly.com/uploads/1/3/4/7/134745979/sokabipakifalix.pdfIn PDF document text
    • https://gorejorifal.weebly.com/uploads/1/3/4/8/134888975/nuwupoluwejusej_wijawebesoxut_fuvuxodi_ruligewojiseg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5f9cb4d180cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_5fa0ced877763.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/kavitokolezub/opposite_words_in_english_with_hindi_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/fetexafisuvidiful.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/32606217518.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/mamax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2674f1-aa18-4c2f-92d5-1557ea57e600/16018184392.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/cfdi_3._3_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995e6080-b398-47ff-ae5d-b969ce3eafae/minecraft_1.9.0_apk_no_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c81a4f-08c9-4fd0-bc61-56007d4363b1/83378408299.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/phonics_reading_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6fa90a-4ac5-4ade-a220-00f2d98306ce/educated_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/joker_2019_free_reddit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 5352 bytes
SHA-256: d1550edc4a7742f65c4c7e88e6ba1205a4045e0f8306c5ae1b3dab57899b6f61
font_01_sfnt_off0000fee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 10520 bytes
SHA-256: 7e8277d831bc3a725609481fa8dcf52535076c88ff65f326a2898d39b697da00

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