Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e032d6de443427…

MALICIOUS

PDF

129.1 KB Created: 2020-12-31 02:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b8c34608ccb25dd573994454f75816d SHA-1: cfec35e435e18042994ca429042445fe333ae7d4 SHA-256: 87e032d6de4434271b528bc9e0331351e0e47c05a0cb6768c2e2c8a1a8bd3d52
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain and another to a PDF file, suggesting a link farm or redirection to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users, likely for financial gain or to trick them into downloading further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://trafficel.ru/strik?utm_term=sword+art+online+arc+alicization
    • https://cdn.sqhk.co/pivugisaxap/KFgjJpZ/57314344331.pdf
    • https://cdn.sqhk.co/bujavenizake/hhjgwvh/geometry_parkour_apk.pdf
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/8721423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/65623693-169e-432e-9a30-cf3f609c1bd0/40381409549.pdf
    • https://s3.amazonaws.com/bulalowisu/trane_air_conditioning_manual_6th_edition.pdf
    • https://uploads.strikinglycdn.com/files/52b6b8d8-22a6-4226-ac3a-d2125536eeac/vibotudowusezot.pdf
    • https://uploads.strikinglycdn.com/files/65bd59fb-a359-4791-a37d-62f912b7d71a/54225701642.pdf
    • https://uploads.strikinglycdn.com/files/19f8cb94-6d48-44b6-9462-3878e745bb59/daddy_long_legs_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/a53e0c05-e7d6-4f7a-a5df-d8ec2d5090ec/favugizatexixu.pdf
    • https://uploads.strikinglycdn.com/files/8547e4b3-ca2e-4b81-85ea-2cc08f8be154/59514607185.pdf
    • https://uploads.strikinglycdn.com/files/a4654238-6be0-4ab5-9400-0fee6a376d4e/13124384480.pdf
    • https://uploads.strikinglycdn.com/files/7d585510-1a10-45c9-b7bb-73f70525892b/zamorutafofukagubowasa.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b6a.bin
951308e8ed449dca179da1ec2d3e618c3c49e4d80ef20eeaa269b3b504fac9c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6A 20672 bytes
font_01_sfnt_off00019ddb.bin
95f7160bf60a1a8b1fd14ccb3ca4bfe5f459492201828970bd29b0a3ba635f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DDB 5000 bytes
font_02_sfnt_off0001aefc.bin
bff201de1bf84865cf1e47cee20723504910893d5bf62aaa1cf7899ceacd7050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEFC 2444 bytes
font_03_sfnt_off0001b9bf.bin
793c836cb9f2bbb176fee0e544a3038831153b4b4772fcaed7f25138489b13b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9BF 11596 bytes
font_04_sfnt_off0001e0f0.bin
9c7926b8929b88a1dffb52ec04bcfb477868fd459509337312ce674bafabbb6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0F0 16192 bytes

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