Malicious PDF — malware analysis report

Static analysis result for SHA-256 7649a1428eedabfa…

MALICIOUS

PDF

72.9 KB Created: 2020-11-20 13:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: baa6f29ac8aff07294abaaaf72fe723d SHA-1: 1d464192abf24401a5be53dbe158a70379f14eb2 SHA-256: 7649a1428eedabfae5626c73ce3ae027c35c4c601ea22727875f1e6ef1bfe879
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically points to an image lure leading to an SEO redirector, likely for phishing purposes. The embedded URL 'https://traffset.ru/123?utm_term=showbox+for+ipad2' is the primary indicator of this malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/123?utm_term=showbox+for+ipad2 PDF link annotation
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/da1b464.pdfIn PDF document text
    • https://xisegebimir.weebly.com/uploads/1/3/4/3/134340076/4046502.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/6058268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9a6f42a3026.pdfIn PDF document text
    • https://mixekolasum.weebly.com/uploads/1/3/4/3/134388380/kikewunizeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f907b0856197.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/e1c79cf5-5479-45ab-9909-bf18e5d0d672/kosez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d287c4-00b0-4b38-bc5f-d328e6643c26/one_chick_fil_a_forgot_to_scan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbd6138-6933-46c1-a2ce-a3a67e2202de/majoga.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/eve_online_freighter_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/college_student_resume_templates_free.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_off0000e000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE000 5456 bytes
SHA-256: 0dacbb55880ebc212abf88ec3e360e4403df3aaa7eb5f693b6b9cdf570be6ff4
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 10772 bytes
SHA-256: 0b0095642773da18897d07554fa2f3bd0b31271a97ecda6b70d88062d9635e3e