Malicious PDF — malware analysis report

Static analysis result for SHA-256 61fec698922d5d06…

MALICIOUS

PDF

74.5 KB Created: 2021-02-14 08:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 657e0913e59f7ffebf21ae51376e91bc SHA-1: a5a46d292aadba35842a5147b6acc59a1b26ba63 SHA-256: 61fec698922d5d0633d007b50dad01e9411153ab0d2786ad6e1e7d6b7895cbc3
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a prominent one pointing to 'baarspo.ru', suggesting a phishing or malware distribution lure. The 'utm_term' parameter in the URL indicates a potential tracking mechanism for a targeted campaign.

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://baarspo.ru/aws?utm_term=canon+ip1800+printer+software++for+mac PDF link annotation
    • http://copyrighthelpbusiness.net/dodutonugojivotipifenajfgr7.pdfIn PDF document text
    • http://newoxinap.66ghz.com/behance_free_psd_website_templates.pdfIn PDF document text
    • http://ufenmac.com/teenage_chore_list_templates0h135.pdfIn PDF document text
    • http://mugafopame.iblogger.org/mandalas_de_calaveras_para_colorear.pdfIn PDF document text
    • http://ita-yog.space/5043468327080235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fe9a145934b5.pdfIn PDF document text
    • http://makeyourself.xyz/4124884973hs79m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_5ff61855cc652.pdfIn PDF document text
    • http://funogager.22web.org/cache_cleaner_smart_pro_apk.pdfIn PDF document text
    • http://zathkatow.xyz/binilikiburawowem06rv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vobewegogiz.rf.gd/sime_darby_annual_report_2018.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/sap_crystal_reports_viewer_2011.pdfIn PDF document text
    • http://busikuf.rf.gd/boguz.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/26602537525.pdfIn PDF document text
    • http://gumelojapa.epizy.com/gujoxojunetobinapavetaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/galletas_de_arroz_dos_hermanos_informacion_nutricional.pdfIn PDF document text
    • http://fefekug.rf.gd/bacteria_causing_food_poisoning.pdfIn PDF document text
    • http://rafedorexi.epizy.com/fofujofopajitaketadif.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_off0000d770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD770 5420 bytes
SHA-256: 8969b04bd87eed96951cbbdaaa43b71514746124ffe1c9c2e6cf4cc3e5088706
font_01_sfnt_off0000e9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 10644 bytes
SHA-256: 40c5cacc8e2ec1b20e5da2f6d6369f20d1189a8ab9d257b2f6c3d4b763e38c11
font_02_sfnt_off00010e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E49 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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