Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b5427e744fa9f…

MALICIOUS

PDF

70.4 KB Created: 2021-03-05 03:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ba2fd3add18d1ceb7615ffa8e1a3a793 SHA-1: 7fedcef7e0f7e00b9b147af8707a8b0a5f0ce4b0 SHA-256: 618b5427e744fa9fe138b6f17c02441606a3d29ccca9762f19091f50b173eed2
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://kuzutuzo.ru/strik?utm_term=fender+mustang+gt+100+amp+cover PDF link annotation
    • https://ponawexem.weebly.com/uploads/1/3/2/7/132740185/5569067.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/bkQjige/desovavutafatutusudav.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/jeahjHN/alone_movie_tyler_posey_release_date.pdfIn PDF document text
    • https://lejalebenepuk.weebly.com/uploads/1/3/0/7/130776022/jiwevivobasinufuso.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/coEihgj/selemojujigu.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Y8HdR6t/vevuvanoselemikarigevusew.pdfIn PDF document text
    • https://newakikijako.weebly.com/uploads/1/3/4/3/134351088/xumajela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/58451262617.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/best_stihl_blower_for_home_use.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/kodakemubofakareraguxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb6a3d-8747-444d-89c0-17cd8f00e90b/94212017685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48960c5c-119e-4845-9dae-6946d2e83d8c/the_good_the_bad_and_the_ugly_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/arun_district_council_report_fly_tipping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d017d147-1fa5-4f88-ab3f-f43b19ca6703/jesus_the_same_hillsong_worship_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/barcode_scanner_api_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1227827-2db4-44c6-80e7-2fd67e4bf9fb/rekidofabuxuvukalenuvokew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68ee603-7163-4435-83a9-4489ddd1d281/7584621689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766125ed-a031-4615-8cdd-b108a615e3d9/what_is_meant_by_non-verbal_communication_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870bdcff-39ab-44b3-8616-bebcce1ca8a9/what_is_the_4th_step_in_the_12_steps.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_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 5568 bytes
SHA-256: 2bac3565d69899daf64945acaeecefe2e625a82a3c06b733966278626d28fe04
font_01_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 10120 bytes
SHA-256: bcee3f76b3e8d563094aa217594412cf89650b6280b60b383b0360befeb034d2

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