Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc41b9141089bf6…

MALICIOUS

PDF

86.8 KB Created: 2020-12-04 12:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 36c8433889d5fd003a034485a4ee0526 SHA-1: 78828c18e79ee4cca9090369b42db687c0509cbb SHA-256: ebc41b9141089bf65b004aeaf269b7fa171e84ea5f31fb0d478c8169e61d714d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/strik?utm_term=yesterday+tractor+hauling'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support the malicious nature of this PDF, classifying it as a phishing trojan.

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
  • 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.
  • 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://traffine.ru/strik?utm_term=yesterday+tractor+hauling In 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://s3.amazonaws.com/bufexa/best_android_tv_box_under_100_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/disose.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/79181934127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c49fa71-12f4-4a36-b4e2-ff3b9a275a97/winenoledisomelu.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/schwinn_bowflex_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/html5_boilerplate_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727e65c8-97d9-4a2b-8eb8-7e3fc78c94c5/97406604590.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/vodex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dca7165-4fd6-4260-bbe8-8a5ad96b102d/bdo_warrior_movement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64298bf5-7ebe-439d-a7d8-6f5bf16e4bbb/wolf_of_wall_street_free_online_streaming_no_sign_up.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fbb61c8c741314323605/t/5fc264723570fb44d1505762/1606575219909/22625396740.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/timenirumarubunutagujijam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ec8ffe-3e1c-498a-a33c-6818287f3bf6/slader_asi_se_dice_3_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e507241-8bae-4c57-ae48-12932151dc7f/harmony_electric_guitar_h802.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a6398139af0376657f99/t/5fc5f4a29d793648405a7482/1606808747253/angelina_jolie_weight_kg.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/hack_gu_monster_guide.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_off000106e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E3 5148 bytes
SHA-256: d516b74ff5b3c869aeada03e221d06ca7af9cd72ca8f5c6e113a37ce2586c972
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 12152 bytes
SHA-256: 02095d4eabc5d53e608a35195c4ea54dcdfec42a0fa250af0eaf252f8cc1c146
font_02_sfnt_off00013ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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