Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fa2c47abf61bdd…

MALICIOUS

PDF

77.4 KB Created: 2021-06-09 07:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 02cdcefb3582c5716f278a90c96be18c SHA-1: c9bb0b4142d741b69f929bfb6b312a29834c5973 SHA-256: c4fa2c47abf61bdda77c94df4b4f98edf8116fa3bf46b17e12d045c8d9623305
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. One of the primary URLs, 'https://archism.ru/pbw?utm_term=jordyn+woods+and+tristan+thompson', is suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier further indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://archism.ru/pbw?utm_term=jordyn+woods+and+tristan+thompson PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464720/normal_605cd7ae1e6e9.pdfIn PDF document text
    • https://bawovaleza.weebly.com/uploads/1/3/2/6/132683088/wiwob.pdfIn PDF document text
    • https://nunifabemavi.weebly.com/uploads/1/3/4/8/134871907/24bfc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fe9c4f538d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_605ffe0d278b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_60bd7e98c1c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_606ade285ca16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_6015257d2a59f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_605b9ded9949f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55efb0f-52e7-49d3-8700-b7d671dda74f/midolufex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18716008-f413-499c-96a7-d2fbb48cc2c7/42_laws_of_power_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bace3562-02b8-44ce-bb5d-f57748e135df/39103682848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6acf018f-6411-4f01-98f7-153833fdbd93/ejercicios_comparativos_y_superlativos_en_ingles_3_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67704f9a-4318-4a15-b11d-1c2d0ef58350/different_types_of_standard_deviation_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4462e362-c000-41bd-a3dd-a1a1647dbd5c/organic_chemistry_tutor_calculus_1_final.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c214fdde-60b7-4bc9-af90-21888365e827/how_to_use_a_shiatsu_massager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e28c5db-81b4-45a5-a5d8-b37fe8e87072/what_is_the_best_burr_coffee_grinder_for_home_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f529f124-f392-4dd9-9849-7119c51b4fee/begikadorip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b264fb88-cb85-4a88-b0aa-86866fc84a2e/xesuxozibadijowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813815dd-bd7e-4062-803d-d5dc38084ff4/resident_evil_4_cheats_pc_trainer_1.1.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2211a5f-13cf-4286-aa1e-e485a944cf10/how_much_does_a_coleman_pop_up_trailer_weigh.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_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 5348 bytes
SHA-256: 970d8ff2e9babe91925d205033b1a8e391a89ede9bc0a45387ad504876c32c8e
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 10844 bytes
SHA-256: eeb6d0662659b0771aee5cc7d30df54718ba68cbcbc91f8b2a18f45307c1ab19

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