Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cb1e6b4c1db6e9…

MALICIOUS

PDF

92.5 KB Created: 2021-03-16 10:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a4701abedd64db574f91db55c6dd05e SHA-1: d75c7ee8af5cc7fa4d8d4c352bad2fdf8618bc49 SHA-256: 12cb1e6b4c1db6e9c6522714ec67c2f79ef4a0e67bda97b7158769113c86b52a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://ponafet.ru/strik?utm_term=where+do+red+harvester+ants+live', which is likely used to redirect users to phishing or malware hosting sites. The presence of ClamAV and ML detections further supports its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=where+do+red+harvester+ants+live
    • http://gifozuxozud.22web.org/57216394309.pdf
    • https://cdn.sqhk.co/jiguluzufuwa/h0jfghH/redazubesulavixaminotor.pdf
    • https://cdn.sqhk.co/pumafuki/jjnjfXG/simple_id_card_template_psd_free.pdf
    • https://cdn.sqhk.co/kolokejo/dijhhmS/wifi_drivers_hp_laptop_windows_7.pdf
    • https://cdn.sqhk.co/jarebomu/jeigGTw/magic_the_gathering_tournament_deck_list.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nasewuji.epizy.com/mizuzonugipujibapakefijeb.pdf
    • https://uploads.strikinglycdn.com/files/8fe49075-3888-4490-9f02-9ece379a7750/gre_exam_practice_papers.pdf
    • https://s3.amazonaws.com/zetituri/interior_design_colleges_in_texas.pdf
    • https://uploads.strikinglycdn.com/files/921ac09d-31f4-44ca-bcee-431ddaf4ce31/bible_commentary_free_download_for_android.pdf
    • https://uploads.strikinglycdn.com/files/1dc8acc2-54d5-4561-93e8-f2889db13d7e/revuwibifobivet.pdf
    • https://s3.amazonaws.com/memobofilenabon/tatisekokatuvuzesosiladix.pdf
    • https://s3.amazonaws.com/vazisi/poltica_del_siglo_xix_en_espaa.pdf
    • https://e9155d39-0f7d-4366-9ee8-34e17fe3d773.filesusr.com/ugd/9e05b8_a386d8744b4b40c9991b9bae26e78f96.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ec03163-f29b-4306-bfcd-d16a9e206ccd/d-link_ac1200_wifi_range_extender_dap-1610_review.pdf
    • https://s3.amazonaws.com/dazifozixawus/how_does_mitral_stenosis_cause_afib.pdf
    • https://uploads.strikinglycdn.com/files/37d90506-8aa3-4153-a65b-443a95f0129b/aqualink_rs4_spa_not_heating.pdf
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_96ecab75585c4a1891cf11900d5e40aa.pdf?index=true
    • https://s3.amazonaws.com/jinabisura/97942655381.pdf
    • http://nagubevisus.rf.gd/6086468597.pdf
    • https://uploads.strikinglycdn.com/files/891af936-3a88-4476-86f6-bcafa929a751/breville_smart_oven_pro_or_air.pdf
    • https://uploads.strikinglycdn.com/files/58fd4c6a-a59b-4ec0-beff-c91afb0ddae5/junie_b_jones_list_of_books_in_order.pdf
    • http://jixopararaz.rf.gd/biserial_and_point_biserial_correlation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a13.bin
353eaa7ea4a46eb81352235fb31714b544cd2a93246988ab4c267ad7183eb2b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A13 4984 bytes
font_01_sfnt_off00013b10.bin
8e8058a92b806a8f83c806fa634680f773383ffa1d3481e618ef1e795af04f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B10 11680 bytes

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