Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcb243e785839ca…

MALICIOUS

PDF

89.6 KB Created: 2021-05-18 11:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2f20d6b7fa1914c873df2c127a036ef9 SHA-1: c875039b137194ebbe8aedc236acdc33f6cef788 SHA-256: bbcb243e785839caeda0b3b54cfe7778d9500db2f3107598ff17f94a72fef29d
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('ponafet.ru') that is likely part of a phishing campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent to distribute links from disposable hosting. No scripts were extracted, but the overall structure and URL analysis point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=what+is+brinkmanship+in+simple+terms PDF link annotation
    • http://vamofawevized.22web.org/85763633638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6064e53586cf0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5fc8430cd7352.pdfIn PDF document text
    • http://rikeropovi.22web.org/badrinath_songs_mp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_6055df8db44b2.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/free_app_to_add_text_to.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5fff68a1d6ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5fea45ee8a383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/16931221230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/767aa348-2791-4949-8cc8-8a6865020628/reset_big_jambox_to_factory_settings.pdfIn PDF document text
    • http://palomidifigur.epizy.com/69878403361.pdfIn PDF document text
    • http://wokezafuvix.epizy.com/basic_business_plan_template_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9361b33-ac20-4d96-8d02-87790039601d/dijetapedinugoro.pdfIn PDF document text
    • http://pixutuvaw.rf.gd/fesimirewelipemuli.pdfIn PDF document text
    • http://wisotuv.epizy.com/barium_meal_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/69887438400.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/79377571436.pdfIn PDF document text
    • http://wanudoxemix.epizy.com/plantronics_backbeat_pro_2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c84a76-2be8-4cd8-ab38-a6b502cd4191/wenifik.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_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 5276 bytes
SHA-256: 8ab91fc8f8ac2cfeb119e981f89cadfccc57a441320138a4926187ca45edaf18
font_01_sfnt_off0001313e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 11256 bytes
SHA-256: ef7bc1451f0f141c42a46b669ae15aa5c56bc5fc736b5c08bcfa3ce585ab169e

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