Malicious PDF — malware analysis report

Static analysis result for SHA-256 08892db80026eba4…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 14:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08c980839749d8f75c0ed6a60b7de85a SHA-1: 971f81c20b82b82621afc03d4148bc25843bc4d5 SHA-256: 08892db80026eba462f6e16fb2e9c2d562eba430455d877b12cacf05388ee934
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm designed to drive traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan activity. The document body, though heavily obfuscated, contains a search query related to appliance repair, suggesting a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=kenmore+electric+range+oven+stopped+working
    • http://juilopkiretlo.ru/14815180558ib2t9.pdf
    • http://udilische.club/851189350016wgbw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/divexikav/sedadukifabawozos.pdf
    • https://uploads.strikinglycdn.com/files/ec39693d-7555-4a95-aaf4-4b54b0c9f977/gore_vidal_history_of_the_national_security_state.pdf
    • https://s3.amazonaws.com/zategafozasiru/sigasipewe.pdf
    • https://s3.amazonaws.com/jolituzoji/baldur_s_gate_android_apk_full.pdf
    • https://s3.amazonaws.com/muvojugejoxip/87351793644.pdf
    • https://s3.amazonaws.com/dowavelaxam/advanced_learner_english_dictionary.pdf
    • https://s3.amazonaws.com/tunenijexe/wekajoradejiroli.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/simple_queen_platform_bed_plans.pdf
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_0e572097364f4132aa8133ca71c7ea20.pdf?index=true
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_f76f3867070c42749bdb2909ffda1881.pdf?index=true
    • https://s3.amazonaws.com/wizuluworafid/sotopekiviriroketalegixus.pdf
    • https://s3.amazonaws.com/rojalexipokadaz/it_project_manager_scenario_based_interview_questions_and_answers.pdf
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_d6ea407242c5420eb3454dd17d2471e5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/38ead590-4f0f-40ea-899b-48e2b748f3b8/how_long_does_a_ds_battery_last.pdf
    • https://s3.amazonaws.com/kefodek/10365804166.pdf
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_a46d515f79c545f5baaa377d27c440d9.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_off0000f5f5.bin
28ee74378e534884984a2c49fbab854101d0141e7c703eb3274a90011e3f9b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 5580 bytes
font_01_sfnt_off000108ec.bin
20c6418d6ce5817a1375e7a495279d47db9751c0b147360784e3765c14dad6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 10608 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.