Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbe0a667cd468d3…

MALICIOUS

PDF

93.7 KB Created: 2021-04-30 17:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1e10216a83633122f05de24d6ce557f5 SHA-1: 7fac18e1c0096aee49c2eb888749bd74608dde38 SHA-256: ffbe0a667cd468d3e73f12c207f53ee40384a5d2cb3c39954bb225dded7b8bd6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many pointing to disposable domains or link shorteners, suggesting an attempt to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=how+did+greece+contribute+to+democracy PDF link annotation
    • https://cdn.sqhk.co/kinuneba/gOihehh/gardenscapes_level_5771.pdfIn PDF document text
    • http://winnerslm.space/bonner_and_partners_the_near_future_reportwbqwu.pdfIn PDF document text
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/8775b767f.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/iLhd9vS/todd_rundgren_songs_love_is_the_answer.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/heat_and_mass_transfer_fundamentals_and_applications_6th_edition_free9dz0o.pdfIn PDF document text
    • https://gawirida.weebly.com/uploads/1/3/0/8/130874347/xugatu.pdfIn PDF document text
    • https://cdn.sqhk.co/disovaje/fjenYig/dajod.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/Z7Hhjhg/futediro.pdfIn PDF document text
    • https://cdn.sqhk.co/ninevowa/J2wgchi/guia_ceneval_exani_ii_2019_contestada.pdfIn PDF document text
    • http://pristav.pro/dizawirugitomufideje87g97.pdfIn PDF document text
    • http://limons.space/financial_accounting_bcom_1st_year_notes_in_hindi3em8m.pdfIn PDF document text
    • http://goodsun.space/3540896359bhxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/iaij40j/ctu_counter_terrorism_unit_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/oQjiXiP/ultimate_soccer_football_mod.pdfIn PDF document text
    • http://eurosett.net/915296225376gjgs.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/aija6hd/gevupitafug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3dc55cb8-b422-4199-bf61-e01c3438862b/oxford_picture_dictionary_third_edition_english_arabic_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824ac26a-8ce0-45c5-81d8-49851ea022a4/is_there_an_odd_thomas_movie_sequel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104edc10-9fe1-41cc-a4de-536ad3a88019/75686796408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c795c4a8-6fa8-4b17-b0f4-a1de6990dc99/dazekidenikefubo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 5228 bytes
SHA-256: 18c0499f4d61dc419ef1f22498f482ec486c9dcf970e13d996ab7e518092309b
font_01_sfnt_off000132ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CE 11304 bytes
SHA-256: 8d517b5d8da23113016140ec917cb036a6891688373bb2c53009afed92d881ce
font_02_sfnt_off00015982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15982 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361