Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a57274b0f94907…

MALICIOUS

PDF

77.3 KB Created: 2021-04-16 04:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 88270000c7e41c5cc0704d8323e72613 SHA-1: eace2b7a411298bcbc41b69bdf9e97389f0bb32b SHA-256: f3a57274b0f949078f9981ab377ef26a8b140a1e8e66a2f96f657d8f17e4aa79
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, with the primary URL being https://jumiwimov.ru/strik. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=best+traxxas+summit+upgrades PDF link annotation
    • https://cdn.sqhk.co/zezetemirag/ghOtpgi/ruman.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/dawuwinuviz.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/imgcjWh/road_bike_racing_wheels_for_sale.pdfIn PDF document text
    • https://luxefelukij.weebly.com/uploads/1/3/0/7/130775337/bed965.pdfIn PDF document text
    • https://kudokazapa.weebly.com/uploads/1/3/1/4/131452939/devubuzapazijozexelo.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/7Egggh1/ice_cream_rollery_reynoldsburg.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/biaiiif/39763950917.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/jvAfjfJ/defender_lyrics_francesca_battistelli_ft._steffany_gretzinger.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/hibNii0/31628961974.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/Nhbkie0/vorizudekup.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/bJZOhd9/lucky_block_addons.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/telizamudoluj.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/cf032e8a-503f-479b-858a-f5c9bcb9ce98/remojewividotejajokifo.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/chemdraw_pro_15_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b56c5d-bfd4-4f8c-89cb-ae5156e22707/58534867577.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/football_games_2018_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3154152-540a-453f-86f2-907a10130a18/what_is_the_agreement_number_for_planet_fitness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7585c9-cf22-4e75-abb6-41300e6480f9/fiverugow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6470fe-853f-4bd9-9fbe-66f6816cfc77/how_to_harvest_butter_leaf_lettuce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d432833e-f088-4056-b910-9fba25fa8e07/dd-wrt_shutdown_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87aedbf8-1403-4134-aeb5-6bd4a27fcaee/89376908287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c533beb3-01a9-4e2c-9747-c491e6529e73/1_cal__kcal__cal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4affd934-675a-48a6-b76a-c3ad0ab9edcf/kenmore_700_series_dryer_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/nepefimijoti.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_off0000eee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE1 5364 bytes
SHA-256: a06554713715d8af0d7ab15b633fee1dfb8a29c41121ab7ef2f1ccff4900318c
font_01_sfnt_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 10848 bytes
SHA-256: edcda4909ec17ee3895f503e3e0be5b04eec406bef7ece24369b8824f68b35aa

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