Malicious PDF — malware analysis report

Static analysis result for SHA-256 0719cfd7b73dc408…

MALICIOUS

PDF

82.3 KB Created: 2021-03-19 02:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b0f9f869bce691d61a6b1a506376bb SHA-1: d4b34ecb30d08f9b49ac95a159d83f79748110c7 SHA-256: 0719cfd7b73dc408306f9b8f46b87233e21c9c73db9228d5e4ee661a91dd9f34
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' and another flagging an external URI. The presence of these links suggests an attempt to redirect users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and link farm heuristic point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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
  • 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://golowaki.ru/wix?keyword=go+givers+sell+more+pdf+download
    • http://vonexalux.sportsontheweb.net/house_rental_agreement_form.pdf
    • http://rodsfish.club/13948828195y4shu.pdf
    • http://dwatches.site/24830779025xy5ec.pdf
    • http://leafester.online/ball_bounce_sport_inc_ashland_ohmatjd.pdf
    • http://sunakijabe.sportsontheweb.net/exercises_for_weider_ultimate_body_works.pdf
    • http://gafabotipunofu.mywebcommunity.org/examen_clinique_de_l_appareil_respiratoire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_1f1d2acc233541d594fde2945f86d2bb.pdf?index=true
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_98c147bc8b994742a3eeaf9bcebe91cd.pdf?index=true
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_2a879e9c8bfe46f3bda89166cd450f34.pdf?index=true
    • http://rivapuremamoge.epizy.com/vebemevomizara.pdf
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_80a6061e43f54beebc431015a3f9a445.pdf?index=true
    • https://uploads.strikinglycdn.com/files/39048021-78e0-4ce3-bff3-758e406dce1b/curtis_sno_pro_3000_wiring_diagram.pdf
    • https://uploads.strikinglycdn.com/files/5b9cb35c-c645-4139-8e32-73b03aeb3487/sozebenilefamezud.pdf
    • https://uploads.strikinglycdn.com/files/a4aa7df4-8392-4282-9fc1-b83610976804/79668407415.pdf
    • http://xezaretidatoro.onlinewebshop.net/72156775219.pdf
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_242c157e37ed4b4d8ba2865d2bd1ef8e.pdf?index=true
    • http://zitotinew.rf.gd/catholic_english_choir_songs.pdf
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_1a7bdcaa78de40a7a94c642743391b0f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea588129-2a74-44e1-9671-2baa9a89cacc/dofudadozemumesasam.pdf
    • https://uploads.strikinglycdn.com/files/0e723ef9-190d-4610-9dbc-692b1a03f657/zixumuxudez.pdf
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_25bcd7cc72b24b9fbe073c177e7b217b.pdf?index=true
    • http://rujekikixew.epizy.com/3244346423.pdf
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_83c6831137d646aa8c41946c8bf1e023.pdf?index=true
    • 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_off0001049b.bin
7c9330d7d5687e52f8cd72d96bdac3ca53a1f051505ca43d1b5dcf5ca8868598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 5544 bytes
font_01_sfnt_off00011780.bin
48c961de31cf5f9db3eed413b3321453cdb4d1f608f9a16e1685da10dd536796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 10448 bytes

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