Malicious PDF — malware analysis report

Static analysis result for SHA-256 7665d69011d82ec5…

MALICIOUS

PDF

75.4 KB Created: 2021-04-01 21:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2aa1ffad124bf1ced8e37a72901a283b SHA-1: 2445da8e80168ba915981ab784fe74b70ff0b7c4 SHA-256: 7665d69011d82ec58d4fb59ee5bfcead453c0f5d710843552107cceaf07d2e98
186 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 attract users searching for specific content like 'sql server database books free download pdf'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/award?keyword=sql+server+database+books+free+download+pdf PDF link annotation
    • http://lnstagramverifiedbadgeshelpcenters.net/brother_mfc_7360n_driver3vusa.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/596518.pdfIn PDF document text
    • https://nabatiniwoz.weebly.com/uploads/1/3/4/8/134889778/losatadujejufereraj.pdfIn PDF document text
    • https://wovitinukid.weebly.com/uploads/1/3/4/3/134372120/6d208dc5942e65a.pdfIn PDF document text
    • http://allwoman.site/15374720966nwb67.pdfIn PDF document text
    • http://sorulaxawo.iblogger.org/54316119708.pdfIn PDF document text
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/8944f3.pdfIn PDF document text
    • http://potoborotagivud.22web.org/adobe_reader_download_for_pc_windows_7.pdfIn PDF document text
    • http://shop-you.xyz/5285760949902mof.pdfIn PDF document text
    • https://wakabidodez.weebly.com/uploads/1/3/4/6/134632857/sebasesu-vuvizilusefis-lomud.pdfIn PDF document text
    • http://winoorama.fun/fapebiwukivf0oz.pdfIn PDF document text
    • https://miragojed.weebly.com/uploads/1/3/1/6/131637546/9383855317b53.pdfIn PDF document text
    • http://wonnaturila.space/kikelagetoxikekadozohd2pr.pdfIn PDF document text
    • https://voxonexagigiwal.weebly.com/uploads/1/3/5/3/135346225/tejodiluxusu-ketubulo-subimeli-zomor.pdfIn PDF document text
    • https://wujewogo.weebly.com/uploads/1/3/4/5/134586314/e1395e.pdfIn PDF document text
    • http://ver-alex.website/zutetehso80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4388bc-323c-40ef-b703-faeda425a4c1/how_to_get_voicemail_off_panasonic_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8daf794b-3bb5-47d3-b2dd-b713a060febc/total_gym_xls_accessories_australia.pdfIn PDF document text
    • http://koroladejoj.epizy.com/80320104306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0ee05a-6f7d-41f5-b10a-40b5c250e59b/zigiwavuzowutijixoxipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27de98c2-82f4-4215-b8ca-baa4b6205f57/dongri_te_dubai_marathi_book.pdfIn PDF document text
    • http://mirimanomuropa.rf.gd/gulewaruve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c390e4db-34b3-46b6-9d96-ccfcb1b4575a/how_does_lpg_automatic_changeover_regulator_work.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 5620 bytes
SHA-256: cb0fbe4047761790083c01efea1075ad2ab58fa6b1363def7278e2d3055d71a2
font_01_sfnt_off0000f980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF980 10812 bytes
SHA-256: 45acf232892b8d9dcdd50bbf05de9c2befd83bfad384ff95dd71dc4df373de37