Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abbaf7d3205836a…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 03:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c74a306a705f5166a1e6432a5312ff9 SHA-1: 90f2f229788f5aa654b972005cc44fb860d90f3b SHA-256: 1abbaf7d3205836a65d3b1a7d48a382a2383b8a24c13606eec83dd6e58d60df0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=free+fall+answer+key
    • http://matroskin.space/daily_planner_app_iphone_free5p3aq.pdf
    • https://temizugejifo.weebly.com/uploads/1/3/1/3/131384470/gonuromad_patim_gafetu.pdf
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/2705257.pdf
    • https://cdn.sqhk.co/disarelas/jiv7jcW/jarepiz.pdf
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/c2668bc687.pdf
    • https://mexarufuwusa.weebly.com/uploads/1/3/4/5/134599415/4676046.pdf
    • http://trysol.xyz/the_good_lord_bird_charactershiark.pdf
    • https://cdn.sqhk.co/rivinodati/bXjeaO3/83958690865.pdf
    • https://cdn.sqhk.co/wepunajexiju/d0geJyk/manebasaragilojemi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a5fb22e7-0aec-48b8-9f3a-577551e554d2/wayne_dalton_quantum_3212_frequency.pdf
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_ee1558d6d9a24dbd8a96562fd9a31c4a.pdf?index=true
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_ea3ba57c351d4d3fbc296db3eec49739.pdf?index=true
    • https://s3.amazonaws.com/julexekubaj/rogopuwiwu.pdf
    • https://uploads.strikinglycdn.com/files/d62d047d-6f07-4408-bd23-477c6ecde615/how_to_trade_forex_for_beginners_book.pdf
    • https://uploads.strikinglycdn.com/files/f45c0508-3399-4f27-b638-f46fcb3ef59c/learn_spring_framework_and_spring_boot_with_hibernate.pdf
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_da312bac802f479daeec58b783336a1c.pdf?index=true
    • https://s3.amazonaws.com/lizuseguwix/what_is_the_price_of_smart_watch_in_india.pdf
    • https://uploads.strikinglycdn.com/files/fdc500d7-8867-4a83-ae0d-0c29e55f9834/vukupugosanesi.pdf
    • https://s3.amazonaws.com/fajetufekejo/912789019.pdf
    • https://s3.amazonaws.com/sefipa/acute_exacerbation_of_chronic_bronchitis_treatment_guidelines.pdf
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d1522acf2f19437c935fa408b0bd36d4.pdf?index=true
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_43fe1873e0fa47f2b1ab9460891f0d75.pdf?index=true
    • https://s3.amazonaws.com/tevigotu/loctite_ablestik_2902_data_sheet.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e897.bin
9f34a514f740584b3d2c1db391d3ab85773e4a78fb8c45d75911d99ebab008b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 4524 bytes
font_01_sfnt_off0000f806.bin
c8a1f2c0701ab12d97ab9176c124d4fe291ed40fc2fb36b2dfdd5580dacb3178		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 10112 bytes
font_02_sfnt_off00011a9a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9A 4324 bytes

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