Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f58f3d9b54d4847…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 03:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8bc4b7a58d64eede215b3ad8ff217bf3 SHA-1: 7d77c164709cf940b89a911d0e6f9f91649a9bfb SHA-256: 2f58f3d9b54d48475cf25c3aec8aa87a08a706bb94dbc89617fdbf7194697f5e
226 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to attract search engine traffic. One heuristic specifically identifies a suspicious link lure pointing to 'http://loginwithfb.site/turning_pro_steven_pressfield_free_downloadl6hyl.pdf', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://nipisod.ru/strik?utm_term=directv+remote+control+codes+for+samsung+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369927/normal_603b369bc2d9d.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/vhgDxif/classical_piano_musicians.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/Shcojgm/great_farm_dog_names_girl.pdfIn PDF document text
    • http://opt05.ru/unit4_excelerator_manualzz338.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/d05bb03936444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393349/normal_5ffe814e9c92b.pdfIn PDF document text
    • http://onlyforyou.space/46072884574124lj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409623/normal_5fddd850a5a64.pdfIn PDF document text
    • http://yewes.space/jumabujefopoxatakukamipeld1iv.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/SF2ptjc/spirit_riding_free_season_9_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/HghaZGI/revifudufobesokofoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_602f1303d2e6b.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/ga6TqEY/planetary_annihilation_commander_codes.pdfIn PDF document text
    • https://jonapofa.weebly.com/uploads/1/3/4/6/134699055/8362312.pdfIn PDF document text
    • http://foyou.store/831520557763q7y4.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/n2idfhc/yellow_finch_california.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_5fd0d9e3afa82.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/nosali.pdfIn PDF document text
    • https://makojinoguj.weebly.com/uploads/1/3/1/4/131406607/dususezitugepad.pdfIn PDF document text
    • https://cdn.sqhk.co/podidiwi/1gjjeJM/partymasters_fun_idle_game_mod_apk.pdfIn PDF document text
    • http://kind-insta.site/linksys_ac1600_ea6400l7wrv.pdfIn PDF document text
    • http://loginwithfb.site/turning_pro_steven_pressfield_free_downloadl6hyl.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/wopebexabibe-raluvawofupel-vuvumopomoriluv.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/lasko_42_wind_curve_tower_fan_with_fresh_air_ionizerafhrk.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/jaroxusazejebivuguysm5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 5400 bytes
SHA-256: 91d5c49e91b6628fca3f2ef8c7bef8e5f4d1bcd16a898af9d1019b55646231a1
font_01_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 10648 bytes
SHA-256: cc5bbd462933e9fc1ef35a8fe56d1199b255bd829c69613eeaf646b8ab6363d1