Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bec511f35539fe6…

MALICIOUS

PDF

112.7 KB Created: 2021-04-03 07:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0f6a2342e87d08a578b9d1f4e60a2b8f SHA-1: d39517b94eefa1d70104343561f5b092aa1e4c9c SHA-256: 2bec511f35539fe6483c93c53ef85c3e08331e6b3fb1dd4db69e37164c167047
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users.

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://seumenha.ru/award?keyword=anti+terrorism+amendment+act+2020+bangladesh+pdf PDF link annotation
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/jowubinevilor-mejopovibuvuxiz-doliregigubaf-lijudosonije.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/945380.pdfIn PDF document text
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/570902.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamuxeg/eiaiayz/leluxadutu.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/bzIigic/vunireja.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/desito-begepipaladovum.pdfIn PDF document text
    • https://fozonened.weebly.com/uploads/1/3/5/3/135326763/tifenubusinofito.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/d9ih2ia/cbse_guidelines_for_class_12_exam_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/vgehFoc/dead_eyes_lyrics_in_flames.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/gjgiojj/air_combat_pilot_ww2_pacific_download.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/dasirobole.pdfIn PDF document text
    • https://wefakibulebu.weebly.com/uploads/1/3/1/4/131408371/jatarado_rovutonuloguveb.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/hiijJau/28481164292.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.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/4f7f4304-cf60-4953-b3f9-713ee0b70995/solid_state_physics_kittel_8th_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/790a7338-12cf-4923-945b-b0d6f8ea0dc8/100cc_dirt_bike_for_sale_under_1000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815faaa8-5507-4d99-ad14-565f7f36ed4d/67991535137.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_off00016695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16695 5316 bytes
SHA-256: 528f2e3f613679529b141235518ad838a486a09839cb9f251229d0cd0adfd46e
font_01_sfnt_off000178bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178BD 5972 bytes
SHA-256: 09719a4aa892e5b8bc9b1f2abf57c4dbf2239661fd1aa40189747524c44b700e
font_02_sfnt_off00018cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CD6 12440 bytes
SHA-256: e863d549b6b4b069e7848a48208bf1e35bd83ec09d882500d46f05449c181909

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