Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c4421b7ad20fa9…

MALICIOUS

PDF

113.7 KB Created: 2020-12-26 00:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 262dc9ac7c97f0f76cfc754198e256ff SHA-1: 16bab5f98a21776ee30bff9b5e9e84173c9bc583 SHA-256: 97c4421b7ad20fa9d26b8766d252675199e0e1f3daf20b85ab5997abf13d4d11
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains lures typical of advance-fee scams and explicitly requests recovery secrets or private keys, indicating a phishing attempt. The document also contains numerous external links, including one to 'trafffe.ru', suggesting it aims to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • 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://trafffe.ru/strik?utm_term=hero+vision+iron+man+ar+experience+mod+apk
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5fa094535de0d.pdf
    • https://joxeluduxena.weebly.com/uploads/1/3/4/7/134772203/6182756.pdf
    • https://negedawitadunez.weebly.com/uploads/1/3/4/5/134587096/xipelav_bozaxusu_bumifidu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a54e4acb-d832-40fb-a959-f4aabb8963c5/29765012732.pdf
    • https://uploads.strikinglycdn.com/files/d4876f2a-b5a7-4489-aed6-022775978dfd/43599195954.pdf
    • https://uploads.strikinglycdn.com/files/a1f3a18f-aff1-4d63-8ee5-52afed1799ce/zomiboxis.pdf
    • https://uploads.strikinglycdn.com/files/ad8b16b8-dc6b-4fc2-a30c-671ff2d9b9b9/xesasevi.pdf
    • https://s3.amazonaws.com/xasovewipeje/ielts_answer_sheet.pdf
    • https://uploads.strikinglycdn.com/files/b5f340df-a0d0-4805-bd38-b08bf7839d28/27764195009.pdf
    • https://uploads.strikinglycdn.com/files/e293c2f9-b06b-41ec-a9a7-2530b3ef24d2/86590917617.pdf
    • https://uploads.strikinglycdn.com/files/563983fb-b89d-4fb7-9412-a126bba0a01a/the_basic_practice_of_statistics.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151a9.bin
858a6ea6534735ee552d9b209b911f06f8839563477ee28811924aac6802177b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151A9 5340 bytes
font_01_sfnt_off000163b8.bin
39f1ec688b51db3f510b634558ef2ed33b02c934f986d36eea4acc3b5199c93a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163B8 4740 bytes
font_02_sfnt_off00017572.bin
b878308ad604c5f8c0b9f68c4bac66d1f62a11401436825ec4b9c27bc9fc310e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17572 12376 bytes
font_03_sfnt_off00019eb0.bin
6e34aadee379562612f79fa474a56744fd4b45636b550c4047273e66b6a9cd95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EB0 17420 bytes

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