Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a5d351bd910a60…

MALICIOUS

PDF

69.2 KB Created: 2021-01-02 20:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d698a587bdb680386fd22f6ec094cc81 SHA-1: 5142bda99ced7f829e3d60b52b289608a346ee13 SHA-256: f4a5d351bd910a60ec45ac5dd9f6c1b658446b64c15cbd84e535533909799e9b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL. Static analysis heuristics and ML classification strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The embedded URL, 'https://traffnew.ru/123?utm_term=dog+getting+hit+by+frisbee+figurine', is the primary indicator of a potential phishing or scam attempt, likely intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=dog+getting+hit+by+frisbee+figurine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5f9f8c0ba0dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f89e64c66053.pdfIn PDF document text
    • https://kazeroxunixon.weebly.com/uploads/1/3/4/8/134885145/godajipomusemilaso.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/2569721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_5fa2e334e4b77.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/6a4411616ac75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5901611a-32a9-413f-91e4-b0a4a7889e7e/bitukamarabajusir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd0830b-f623-48b0-983b-abe1d30ccc76/dichotomous_key_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18e1594-8ec2-4a6f-9d9d-d9e6d192ea31/tuxupimidusovine.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/acetaminophen_iv_davis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7e9aa3-fb6b-4a32-a98b-4427f0857fd1/jemowugav.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/4448324146.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/18439267629.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_off0000c588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC588 4912 bytes
SHA-256: 971c2bf4a1a5fae1b383cebab89b3d6b7aed6046f865fe19a2625f4b58cc6d1d
font_01_sfnt_off0000d646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD646 10488 bytes
SHA-256: a6b7c2b7c5464f74fb81395cd2b488231e63f15874793d9046f79432f1feafce
font_02_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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