Malicious PDF — malware analysis report

Static analysis result for SHA-256 a430c908b1f38541…

MALICIOUS

PDF

80.0 KB Created: 2021-03-27 18:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9644034b8d1a0d2172f8d8a8f9934f SHA-1: 90f785e8d0779239ddcef2e750dbec8bb5499279 SHA-256: a430c908b1f385412c8e16a5f691d3abdfe5ab382e127ab9aad555238f206bf3
156 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. The presence of a large number of external links, including a 'link farm', suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or content-luring attack vector.

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-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://midufefew.ru/wix?keyword=progress+index+obituary
    • https://cdn.sqhk.co/fuzokikili/igcgWhj/48376604174.pdf
    • https://cdn.sqhk.co/sojowidaz/q9ge1W2/call_of_duty_mobile_game_download_play_store.pdf
    • https://static.s123-cdn-static.com/uploads/4420013/normal_5fe0684c5921c.pdf
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fdf05a566444.pdf
    • https://cdn.sqhk.co/mugukawi/8W9fifD/automatic_hook_setter_fishing_pole_holder.pdf
    • https://cdn.sqhk.co/tupujokuz/LcJidgg/wagemupinazuti.pdf
    • http://puzofogerexiwi.22web.org/60873870354.pdf
    • https://cdn.sqhk.co/rezejigobip/d2jgVjg/gewimoxume.pdf
    • https://risebezisenozo.weebly.com/uploads/1/3/4/3/134375164/kowofisamaj_poledalizov_kelebenidegires.pdf
    • https://tojejalunegod.weebly.com/uploads/1/3/2/7/132710717/72a33c2ab9d2.pdf
    • https://fogevama.weebly.com/uploads/1/3/1/1/131164507/12f0558d9140.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/hhKggle/more_fish_in_the_sea_song.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dajolebewun.epizy.com/43359524153.pdf
    • https://uploads.strikinglycdn.com/files/ec572ea8-86e2-444a-a96d-39fbf753a256/how_to_deposit_share_market.pdf
    • https://uploads.strikinglycdn.com/files/88167ad6-9711-46d3-87a4-84b2006e715d/towisarodef.pdf
    • http://zowadakal.epizy.com/rocket_propulsion_theory.pdf
    • http://ginokaze.epizy.com/samsung_warranty_card.pdf
    • http://rabuwupitakif.rf.gd/zuvakir.pdf
    • https://uploads.strikinglycdn.com/files/63c6ae37-ff1f-4da8-a795-835467fe78b5/letokonexenegepu.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_off0000ebab.bin
2ac91b9fe3e3daa184664b715ad1d241a0bcd8c6f63cdc059e936e00edd0e54f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 5152 bytes
font_01_sfnt_off0000fd41.bin
eac7f874bbce4d8463b5489c50ad91be7adf3ee114c4db476d29a06796fed1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD41 11728 bytes
font_02_sfnt_off000124e3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 4324 bytes

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