Malicious PDF — malware analysis report

Static analysis result for SHA-256 799a32c5e9f08ce9…

MALICIOUS

PDF

93.0 KB Created: 2021-03-19 07:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 29a0fedf716ab53bcde8bedf615ee255 SHA-1: fc9e85458ca8044c373e28aa97984b7d0021ff7a SHA-256: 799a32c5e9f08ce9dc665b9b0d8edeacd7efb90ec6d979643b666fdc3d2991ce
194 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 hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'download button' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=how+do+you+reset+a+sansa+clip PDF link annotation
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/ganopawazijefig-fiwojoto-keduna.pdfIn PDF document text
    • http://the-glow.ru/27227728542qw69p.pdfIn PDF document text
    • https://wibizoginoj.weebly.com/uploads/1/3/2/6/132681485/6470293.pdfIn PDF document text
    • https://selenaza.weebly.com/uploads/1/3/4/8/134878333/vevenomasotepejub.pdfIn PDF document text
    • https://nexevakef.weebly.com/uploads/1/3/5/3/135327015/jikes.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/jgj2Sha/zurer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_603270e712406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_600c896ceb315.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/fijfham/angry_gran_run_game_free_download_for_laptop.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/45b4fba2f2db.pdfIn PDF document text
    • http://free-at.pro/best_online_brokerage_for_beginners_redditxh0dx.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/kgiYahd/pizzaiolo_pizza_magnolia_tx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_181ca4c6f91f4f87a0c19cb39b09a26e.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_53b78d67be0a45b1a537b0fc4d519a3e.pdf?index=trueIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_52feffb16cdf4d4ea9f80bfced146803.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_0d597fa09fcd469b8c37e263149ed761.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/sajetonuvimusutugera.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/at_t_international_dialing_guide.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_5f7c251200dc45dca5669138cb25ed1e.pdf?index=trueIn 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_off00012d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 5220 bytes
SHA-256: df2761ee92d90c7e031f7bbdc2f33bd6b29facb0b2abe4d100b53a6ee65628aa
font_01_sfnt_off00013f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F03 11800 bytes
SHA-256: 952fa3177d0307f5065a299acb37d586dca9eff99014c568875b0f8384d3bd40