Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bf2e0bc2e29f27…

MALICIOUS

PDF

65.3 KB Created: 2021-01-24 07:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d74bdabe3b4c0a78500c31b6413dfb27 SHA-1: b1d8184198df600291baf41027f5f6f58e375cfb SHA-256: 34bf2e0bc2e29f2736c1578302db9f93b0055cda81ddf6b95baed0abf19fd164
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified as traffset.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Og mandino scrolls 1', which is then linked to a suspicious external resource.

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://traffset.ru/123?utm_term=og+mandino+scrolls+1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391308/normal_60045489b8832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488335/normal_60005f9cc34ec.pdfIn PDF document text
    • https://site-1174085.mozfiles.com/files/1174085/susufuvagu.pdfIn PDF document text
    • https://site-1174390.mozfiles.com/files/1174390/vesiwexodiwafutevuxuv.pdfIn PDF document text
    • https://site-1245635.mozfiles.com/files/1245635/autocad_lt_2019_mac.pdfIn PDF document text
    • https://site-1178817.mozfiles.com/files/1178817/cisco_webex_board_55_configuration_guide.pdfIn PDF document text
    • https://site-1183169.mozfiles.com/files/1183169/talking_tom_cat_2010_apk.pdfIn PDF document text
    • https://site-1178171.mozfiles.com/files/1178171/octopus_beak_size.pdfIn PDF document text
    • https://site-1168299.mozfiles.com/files/1168299/gigesogeviz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5feb3a637077d.pdfIn PDF document text
    • https://site-1178275.mozfiles.com/files/1178275/wifemivufujolixopubirag.pdfIn PDF document text
    • https://site-1189081.mozfiles.com/files/1189081/22502005291.pdfIn PDF document text
    • https://site-1177386.mozfiles.com/files/1177386/freeview_tv_guide_app_problems.pdfIn PDF document text
    • https://site-1247208.mozfiles.com/files/1247208/jubilant_foodworks_annual_report_2017-_18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepojijolotezud.rf.gd/charitable_contributions_2018_tax_form.pdfIn PDF document text
    • http://bejofumojep.rf.gd/gavubasofetipuzasa.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/jathaka_katha_kavi_bana_free.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/lajojunowoturobikeni.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_off0000c278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC278 5336 bytes
SHA-256: 8a554df10fd7b5e523fbaff865cf6db67f2e194306c41570b87a30c9bdaa77fd
font_01_sfnt_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 10488 bytes
SHA-256: a963b36155e83e45d35df9761800d9f4ea5af8479042e6f6e7141475ced9574b

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