Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abddc22c4ef6887…

MALICIOUS

PDF

83.0 KB Created: 2021-03-18 19:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cd15ec09886c42990135d7296b6d1ada SHA-1: 7a125a5ff9cbfcf7f2d28b3d13e6b6859b234540 SHA-256: 8abddc22c4ef6887f2672ce5889b83f8dacf74e393fd4724d85f4ced2a454862
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, which flagged it as a phishing trojan. The heuristics indicate it contains a large number of external links, forming a link farm hosted on disposable domains, with a primary suspicious URL being dugedepap.ru. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=how+to+add+terms+with+exponents PDF link annotation
    • https://cdn.sqhk.co/wapuwozelob/thiOidw/my_talking_tom_2_download_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/e04u8ih/ramiwuruda.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/6gijaJc/randall_road_animal_hospital_crystal_lake_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/7nMieqB/best_ringtones_slipknot.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/ejb65ig/kutalaloxaretujemefimobel.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/tevebojepur.pdfIn PDF document text
    • https://nutolaje.weebly.com/uploads/1/3/4/5/134596366/pejinixij-giguwowarup.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/5415109.pdfIn PDF document text
    • https://tajulariti.weebly.com/uploads/1/3/4/8/134863193/gerebezur.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/jawerewukujere.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/ficajhV/tonar.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/ihMj34r/gudetama_tap_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/icxhfhd/battle_craft_survival_apk_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/pTXujcY/32204887456.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/8DajaYK/88138532213.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/Wgf1JPV/earthbound_clothes_shop.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/iif4idv/logidipetitizodukexe.pdfIn PDF document text
    • https://cdn.sqhk.co/jazumagefo/geVgfje/bhavana_mange_chumma_hd_video.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/scLic7m/train_driver_manager_jobs_dubai.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/09d1dc3a-5275-4ba2-8a8f-91221c7d6bf6/sc_drivers_license_real_id.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/mavamusixigebujuziteg.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/10041484707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e91fceb-8ed9-49df-b5b5-8f25175de06b/what_is_the_safest_space_heater_to_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/33629142487.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/dialogue_writing_worksheets_for_class_3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 5288 bytes
SHA-256: b843e883e49121743c9e5804b0c584c61e05f894ce84eca309c0d05b4ddcd239
font_01_sfnt_off00010011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 12092 bytes
SHA-256: 89d1b30b18c890113b01ba39f1cf2df9ddc55e6d284ac438fa5979c3d97923d1
font_02_sfnt_off0001299a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299A 16060 bytes
SHA-256: 2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357

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