Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6693c708c6ff7c…

MALICIOUS

PDF

83.1 KB Created: 2021-04-29 13:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a274192768d8db6562fb06804251131 SHA-1: 21f53025f8c950247e90387a57d81333bff19cf9 SHA-256: 9e6693c708c6ff7c453603bcc9433aba389a2847e55af7fc9041934937d10e4e
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains a large number of external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate 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://zajinet.ru/strik?utm_term=alex+rider+stormbreaker+movie+review
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/6624497.pdf
    • http://nokasosozigof.mypressonline.com/how_to_use_food_scale_for_calories.pdf
    • http://beririka.scienceontheweb.net/intel_guardfish_dq965gf_drivers_windows_7.pdf
    • http://siwivelijutore.medianewsonline.com/78796331269.pdf
    • https://lotekovikerux.weebly.com/uploads/1/3/1/3/131398560/5662357.pdf
    • http://fudopajir.iblogger.org/movumeduwo.pdf
    • https://dewokiwo.weebly.com/uploads/1/3/6/0/136028273/kexazitobe.pdf
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/8933235.pdf
    • http://gajaxujifusokul.mygamesonline.org/a2_level_english_test_sample.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jerolap.rf.gd/vegetarianism_definition.pdf
    • http://tediguku.atwebpages.com/volifadusi.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_4a135873ad4745f4b4f9e1ce122d6902.pdf?index=true
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_283e254bf82f483db15d203c92332cef.pdf?index=true
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_e4203be44d7542af9930a9326b2e7949.pdf?index=true
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_00050700bc3f4d13a48e7cb18f50f531.pdf?index=true
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_f21865f6366a42a8b5bd97c26dbb0480.pdf?index=true
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_e5ccfad9d91f402eb723355cc436922e.pdf?index=true
    • https://be8414c4-f2d5-40c6-b8a8-1a5561a1dac7.filesusr.com/ugd/a452ea_35226d6093334c11b86b898c7889d0c6.pdf?index=true
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_12d098ca6df0488ba0dbe94db9e4b531.pdf?index=true
    • http://vikitadutuxorus.rf.gd/jepupojunisetorupuje.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_off000103ee.bin
da1cea73502e4ed550f022d9d7dfc0d520a956207b6cfeab7f6da2e1854e9b18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103EE 5384 bytes
font_01_sfnt_off00011638.bin
29411147f5c76476de5b0ca1340f8a9a77306f1dc57b8fb06a9a5c454072f58f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11638 11368 bytes

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