Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62e09f7bd4c2c1c…

MALICIOUS

PDF

66.2 KB Created: 2020-12-22 07:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1a3814b316e4e132ecfec879576608b SHA-1: 14fa8757c6fe17f9d9d434359ee9dd766218e09e SHA-256: a62e09f7bd4c2c1c9f5b39d07ee224ed2da2ef6966e67fd74059857c6031712b
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam. It embeds numerous links, including one to a known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to task management, which, combined with the scam heuristics, points towards a phishing or advance-fee fraud attempt. The presence of embedded URLs and the nature of the heuristics suggest the file is designed to redirect the user to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://gettraff.ru/strik?utm_term=todo+task+list+manager
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/pasepavixufevowatose.pdf
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5fb5df203b3e4.pdf
    • https://menebunokusup.weebly.com/uploads/1/3/4/5/134588819/770b0.pdf
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/vupivajuveb.pdf
    • https://static.s123-cdn-static.com/uploads/4404290/normal_5fe164f404bbe.pdf
    • https://xoxazibazosilex.weebly.com/uploads/1/3/4/5/134590820/sopurinixipixadenol.pdf
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/7de9fe58.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fde879f44058d21a0e474c5/t/5fdeb3b02da99c286823acf5/1608430513129/luriwibetekefuv.pdf
    • https://uploads.strikinglycdn.com/files/a4063ade-e446-44d3-9f00-d52a89a01c1c/letipabimizoxu.pdf
    • https://uploads.strikinglycdn.com/files/81c76998-9ced-4ec7-9014-4d9d8f2f4479/semillas_de_grandeza.pdf
    • https://uploads.strikinglycdn.com/files/df12f928-18d7-4419-87aa-25c31ff9897e/davy_jones_locker_origin.pdf
    • https://uploads.strikinglycdn.com/files/14cc8fa6-18b8-4072-8ea5-6376ef35c1b3/sarah_simblet_anatomy_for_the_artist.pdf
    • https://static1.squarespace.com/static/5fc18bbd0b6b03258f3a1e10/t/5fcad5a826a2be7f6dd765b4/1607128489318/ninafik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c536.bin
8cdad4a25f8ca4213de95ae70192fb6241354c4cf3897287a6739e03dead4583		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC536 5160 bytes
font_01_sfnt_off0000d6af.bin
b88610631f8acc3af0d3d9b22aafe6bafdc16549d0500c9bfd0bb8a08396609a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 11120 bytes

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