Malicious PDF — malware analysis report

Static analysis result for SHA-256 283690e87f3b967a…

MALICIOUS

PDF

77.2 KB Created: 2021-03-25 03:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bccc77cd4e52731e6b7fb8a13ea1d6b1 SHA-1: 3a70d9609c2d2f4972e74895429d4ae553d55a18 SHA-256: 283690e87f3b967a15f8d5ec08c6ac8b0203a6d9423a18d96890ec675d5ef4ee
196 Risk Score

Malware Insights

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

The PDF contains a lure for an advance-fee scam, presenting itself as a lottery or prize notification requiring parcel delivery details. It also contains numerous external links, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious. While no scripts were directly extracted, the presence of numerous external links suggests a potential for downloading further malicious content or redirecting to phishing sites.

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-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://seumenha.ru/aws?utm_term=what+are+the+steps+in+human+resource+management+process
    • https://cdn.sqhk.co/xavaxonad/7a9Bicm/bujanujasonadumenoxalak.pdf
    • http://tuwavetatifida.iblogger.org/how_to_install_3m_filtrete_filter.pdf
    • https://cdn.sqhk.co/rubuxupab/hyIhhjb/national_defence_services_career_academy_new_delhi_delhi.pdf
    • http://ginosolatowu.iblogger.org/how_to_pass_navy_advancement_exam.pdf
    • http://xafukuxovikovu.22web.org/calculus_book_pearson.pdf
    • https://cdn.sqhk.co/kapumikogux/SqtD6hj/24649988773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/95c8a083-d058-4c8e-aea5-6ad0e12facb8/69453519342.pdf
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_039980f901b44cfb84e34f2956057b22.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1a1e7ef4-48f0-4211-ba8f-534bd4f12458/marketing_digital_que_es_sem.pdf
    • http://bepenaguvofiw.epizy.com/41680717953.pdf
    • http://potosalusuk.rf.gd/applied_machine_learning_with_python_github.pdf
    • https://uploads.strikinglycdn.com/files/b7cb289d-1bef-4613-bfe2-49a841ea9604/what_is_ls_true_name.pdf
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_9d783837445e4732b17fabb4d386fc61.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f61caad1-8034-41cd-93f5-b766285ace4d/pojasuzawofozadesi.pdf
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_f28f3bacb92c4e42b4f0afbd8c1e03ba.pdf?index=true
    • http://tolimimagag.epizy.com/takawib.pdf
    • https://uploads.strikinglycdn.com/files/05c1283f-c170-4527-8cc6-24c1987abc7a/pibumifetobiwawoxi.pdf
    • http://weniwotazemomin.rf.gd/naletixube.pdf
    • https://uploads.strikinglycdn.com/files/6e6b9c1e-b4de-4960-abc7-cd6526a0fa69/how_to_work_harbor_breeze_remote.pdf
    • https://uploads.strikinglycdn.com/files/8a428321-e5ef-4862-ba2d-b1fb305c0632/dragonlance_campaign_setting_free.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_off0000ef95.bin
34bdadba67c50cdd2d0d86af93719152841242fa3902811ab872b4a3fdfbcc6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5328 bytes
font_01_sfnt_off0001019a.bin
03ead998a212cda433f4d79295acb9e09e45bc7ad3b0c864dfabfa56780489df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019A 10312 bytes

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