Malicious PDF — malware analysis report

Static analysis result for SHA-256 042636b78ac06c27…

MALICIOUS

PDF

68.2 KB Created: 2021-01-06 09:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5f75d5aca110fbe0a25c168e32dbf312 SHA-1: bb275683d17b54a3ea8c7c158eb122a0a420f1e4 SHA-256: 042636b78ac06c2744b73b96dd507bcfa0da17732c8c0ad222726465dd83ecc4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=book+of+assistance+imam+al+haddad PDF link annotation
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/1b43194cd37df60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5fbe31d86bc1f.pdfIn PDF document text
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/lezozuvipiv-vugef-wonagagurufugik-sodadodolesa.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/gihakig/12335428873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459060/normal_5feb6abf7e12c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f8f4972153c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd14affe7bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_5faffdae5fa5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fbbe86e40b23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459787/normal_5fb037f08ae05.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/7702c7a5-8d17-45d4-9604-e600c567cb40/39538339153.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/tecnologia_da_informao_informtica_senai.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/netacad_itn_chapter_4_exam_answers.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_off0000cf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF53 5276 bytes
SHA-256: 429b9ccda3dfdbe0e9a575448c0750718b9ba44a712b13f63fcd94a4bca255e1
font_01_sfnt_off0000e127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE127 10384 bytes
SHA-256: a25ac3afc4873bf520da444054fbee5c270918adb04747a6e72918bfbd585aeb