Malicious PDF — malware analysis report

Static analysis result for SHA-256 374cca169e7fb6c2…

MALICIOUS

PDF

81.9 KB Created: 2021-03-18 07:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5083e61ff2266e1a2ae0e23a60c606f0 SHA-1: de6ad38dc65e43e3c92cc88c28a167ffac3d2fc2 SHA-256: 374cca169e7fb6c286f6584d15fa04de707687a54608641cac348619d71f4331
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of a URL with a 'utm_term' parameter related to a game download further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/123?utm_term=alien+shooter+3d+game++for+pc PDF link annotation
    • https://vowijavig.weebly.com/uploads/1/3/4/3/134319359/nofunol_namawewixe.pdfIn PDF document text
    • http://smilex.club/how_to_win_the_lottery_strategyxs4c3.pdfIn PDF document text
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/924868f4d0.pdfIn PDF document text
    • https://topigofifudonif.weebly.com/uploads/1/3/5/3/135304546/71792440.pdfIn PDF document text
    • http://rewita.fun/523114931169mwpt.pdfIn PDF document text
    • https://sutomoloxoxe.weebly.com/uploads/1/3/5/9/135986515/b48c06344.pdfIn PDF document text
    • http://youtube-subscribes.com/16899282054eggww.pdfIn PDF document text
    • https://weneboremuneje.weebly.com/uploads/1/3/5/3/135317625/jewedi-xelubojepe-zuluxalo-regako.pdfIn PDF document text
    • http://beautytopshop.site/que_es_imagen_jpgflc1e.pdfIn PDF document text
    • http://openplafond.xyz/rerapumafomajamebitijutr0n.pdfIn PDF document text
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/0460fab046ac.pdfIn PDF document text
    • https://matasomorat.weebly.com/uploads/1/3/4/4/134492922/1eea5c179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_5943e4514a0d4ca7a2f7c3cd4f2b386a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/grid_template_areas_empty_space.pdfIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_dfce62e2c5554ca5b69e1b4021deb835.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56690b6d-8fb8-4d17-8689-8433d7b727f5/dell_2407wfp_monitor_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/papilas_caliciformes_que_sabor_perciben.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_4d6ce6c6ff0d4296b50beeed66ddb204.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a39ae8-8818-4aff-8e96-3307c0763033/tolozadasezuromob.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/what_is_meant_by_calorie_in_chemistry.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_ebb33d2e33fd48b8b6adb9ad52a7c27a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/fenamavusizofamona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc87b07-c163-4bac-9e78-c542eebb3260/spotted_lanternfly_what_eats_them.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_48f11c64560f4616b3eba6ad6a8b81ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jifesu/ard_mediathek_ios.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_off00010130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10130 5724 bytes
SHA-256: 479c6a6ec009d4efa0683d4bfa4380148531d6e098f76b7c75f1640de38a8a43
font_01_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 11016 bytes
SHA-256: bef30f0c072f4d7f55e031cbe5fdafeaf1a4feac4586e4a38b22c29e14971509

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