Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5020a29393a726…

MALICIOUS

PDF

128.6 KB Created: 2021-06-07 11:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3305fa0511bd2e26463978e8b4c2cb40 SHA-1: 9e1f0d3b073a6e35e5aabce301eb29c42ea0e55e SHA-256: 7e5020a29393a726693254b11945720a022f11b20f2ca4b00fc45393c885aa79
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 suggesting a lure for a modified application. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates a scam, likely involving a fake lottery or prize. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/pbw?utm_term=revenge+of+sultans+mod+apk+2019
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5feaf00139409.pdf
    • https://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/741e301828b0.pdf
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/jitajevaxu-zanunokebixi-rinosuzolotuxed.pdf
    • https://luboguti.weebly.com/uploads/1/3/0/7/130739177/dfff6b.pdf
    • https://sumigixutaruxaj.weebly.com/uploads/1/3/4/7/134748626/5069420.pdf
    • https://cdn-cms.f-static.net/uploads/4470837/normal_601b7bb76a02e.pdf
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5ffc4d4bb2785.pdf
    • https://lunidopufakim.weebly.com/uploads/1/3/4/4/134482460/7473490.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/79f5c615-501d-4b05-b105-a62e7fca8e71/davefabajojamepukizumu.pdf
    • http://garigor.pbworks.com/w/file/fetch/144427533/test_ingresso_bocconi_2018.pdf
    • https://uploads.strikinglycdn.com/files/051c2409-4674-4977-bb98-569ed46f918d/wizovamidatanegal.pdf
    • http://sazupamufode.pbworks.com/f/fowuzesulerimamusepuz.pdf
    • https://uploads.strikinglycdn.com/files/c6db2556-3249-4b49-9560-abe82d4758a1/wagatepadixerovegoseveb.pdf
    • http://kunozulig.pbworks.com/f/micro_mini_dachshund_puppies_for_sale_near_me.pdf
    • http://daridameku.pbworks.com/w/file/fetch/144639510/athlean_x_workout_plan.pdf
    • https://uploads.strikinglycdn.com/files/c44a1604-114b-44eb-a360-80883245cf99/new_survival_movies.pdf
    • https://uploads.strikinglycdn.com/files/a56fb10a-a55c-4748-be0c-41a1468c95c5/diveletajelelafosurowuwa.pdf
    • https://uploads.strikinglycdn.com/files/e7cb73a7-6aa8-4db6-9167-ea5c823d8719/13293751538.pdf
    • https://uploads.strikinglycdn.com/files/7d1b2a3b-2b6c-4a40-a95a-2cf4cda39a7a/free_cissp_exam_questions_answers.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b9eb.bin
02ad9b361dc35d00c3621aee0e3bd03259854987449c0566eb4df20de87ae919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9EB 5880 bytes
font_01_sfnt_off0001cdfb.bin
a14ef81751a6fd41ea742f1c1cbd4ed1cf67f1853d798c6c1d586d7f7683ddc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDFB 11456 bytes

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