Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fbf03bac7d418c…

MALICIOUS

PDF

78.7 KB Created: 2021-04-07 00:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0c2e3a4b2a749278f9a7b0a9e18be017 SHA-1: 80837779bf9f87d22cdda095a9e5572cbc8fd539 SHA-256: 29fbf03bac7d418c9c79f76d427a243e1d28f5266e863051e1e2b51ce08db9aa
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs points to a resource related to unemployment in Tanzania, likely a lure to disguise the malicious intent. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/award?keyword=causes+of+unemployment+in+tanzania+pdf PDF link annotation
    • http://bexemusu.mypressonline.com/samudef.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/mala_alimentacion_en_el_embarazo.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/eyelash_extension_classes_orlando_fl.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/38783341580.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/foromajirogexuzujujilazo.pdfIn PDF document text
    • http://sujolisake.medianewsonline.com/48753692101.pdfIn PDF document text
    • http://rastet-malysh.ru/15073537286poc1.pdfIn PDF document text
    • http://islta.fun/63737736080aworq.pdfIn PDF document text
    • http://mon-cmbretagne.com/mathway_calculator_apkwjmfw.pdfIn PDF document text
    • http://mavpa.fun/what_is_the_best_quad_rail_for_ar_15cpnow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_98f3851b88f3421c88357887e284d7aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf261459-2b95-4008-b83c-cf69eb00b1fb/zudofimopa.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_ab2b2633644741d08d17d186df0a045e.pdf?index=trueIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/95037311235.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/meio_ambiente_geografia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6358e4d-45fb-4cdd-affb-0c2d4ec85e66/starcraft_field_and_stream_truck_camper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7950b3b2-e83c-46cc-8498-3ff2d64c9644/75188165296.pdfIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_07c03cefd81948b88d6fe50dcc58f852.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74544da-3866-4817-a6d8-4c245d2c2a48/delonghi_espresso_machine_ec702_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce43be0d-b95c-4313-ac35-5f51934d3799/fimunu.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_a87c807a83bb49d78c38cd9fe2db20da.pdf?index=trueIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/accelerated_solvent_extraction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4d8682-a1cb-4a83-9b43-8b866a15e7b9/lanidixajejitatixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae342eb3-9338-4989-ad91-edc6280484ad/electric_circuit_theory_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7276550e-ece6-4263-b8ff-6efee55f1ef8/liftmaster_41d7675_error_codes.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_e0a015c7a0734d5692f2bc8b6cea76da.pdf?index=trueIn 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_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 5148 bytes
SHA-256: 773bf3168358ec5fd2dd548de03b2eceab046f5f674864daffb10a49004eec37
font_01_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 10896 bytes
SHA-256: 4772834bba4b7134cc583924ae3edb84d60431a76b0d251ff7653852befeb025

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