Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a8964d773bc029…

MALICIOUS

PDF

73.1 KB Created: 2020-12-06 07:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 90b164622bc5ddbaca12d17466f90d47 SHA-1: bd98b5b82be31d195571a916f48cf6abab3afdd4 SHA-256: 85a8964d773bc0294022cd52214aa868734390c8fb3e27eaa0670852978f2c9b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains heuristics indicating an advance-fee scam lure. The document body, though heavily obfuscated, appears to reference an 'Aflac hospital indemnity plan wellness benefit claim form', a common pretext for such scams. The embedded URL points to a suspicious domain, likely serving as the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://traffnew.ru/strik?utm_term=aflac+hospital+indemnity+plan+wellness+benefit+claim+form PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9910c3-7313-4e2d-9916-577b1a72e524/77857381405.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/dragon_ball_z_fierce_fighting_unblocked_66.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56ff188c99b6d37c5dc1c/t/5fc694e61972c46e3c84e0b2/1606849767101/pac-_man_256_endless_maze_jogar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18e1be6-7251-4c65-b1f9-ced53d8a545d/distance_and_displacement_worksheet_physical_science.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b5119849b27a00a8296b/t/5fcba94e6fd93023bc09d5d3/1607182671036/rafaneperaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a624e8-d8da-4e92-b70f-22a4511cbee7/chatham_county_ga_property_tax_assessor.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/vavewitadatuwumitenapaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729c3626-7a82-47db-9437-201f2f51f058/bunusiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9940aee3-f459-4b1a-946b-076374026cb1/english_spelling_worksheets_for_grad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f169085bf90c0efd4cbb/t/5fc1eced4f98375720250eba/1606544621746/metric_unit_step_ladder.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2de36a5bc066edfb2733d/t/5fc9feec2ae1264a039721d4/1607073517411/bible_stories_for_children.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/climbing_mt_fuji_japan_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eddf6453-a27a-4f66-8394-bf4585e0bdac/vespers_rising.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc169f3e2fce462bc8f8ca6/t/5fc56569bc819f1cf48defb1/1606772073643/nibigasowa.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/30321642778.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc390e0f9866f3fd2e4e56d/t/5fc4cb973c02f22b9da3bde4/1606732702118/cedar_valley_high_school_drivers_ed.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_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 5716 bytes
SHA-256: e71446e1c4b0552fbb74f56be1eca09bb6aa9edbeeef5686e108179feb2c5804
font_01_sfnt_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 10832 bytes
SHA-256: f36ede80dd85653ec99ce8c008eaa8a7161dac17ac65637505473cc369906bfc

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