Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a49625b168458d6…

MALICIOUS

PDF

68.6 KB Created: 2021-03-06 10:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b2d61979aaf08b36dcd93515cb1677da SHA-1: a87d0f5c827fe300f21f1559b0f48b713128602a SHA-256: 2a49625b168458d603a548554917be61671442c177cae7b2643ec9552874e2f2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary URL, https://lozipotod.ru/wb?keyword=profusion%20utility%20heater%201500%20watt, appears to be a lure for users searching for a specific product, likely leading to a phishing page or malware download.

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://lozipotod.ru/wb?keyword=profusion%20utility%20heater%201500%20watt PDF link annotation
    • http://tuwuneluzuso.22web.org/12965566796.pdfIn PDF document text
    • http://meetchat.space/432621442678msa4.pdfIn PDF document text
    • http://natur-green.fun/do_i_need_a_highschool_diploma_to_be_a_real_estate_agenthi8ml.pdfIn PDF document text
    • http://expo-kit.ru/influencing_others_interview_questions_and_answersrxq50.pdfIn PDF document text
    • http://sajitalunaded.22web.org/532149934.pdfIn PDF document text
    • http://zupurowuzuxule.iblogger.org/wexogasujugadawa.pdfIn PDF document text
    • http://gujufifirisin.22web.org/riwijabixewi.pdfIn PDF document text
    • http://ruvunejipe.22web.org/jinisujowup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sekudevabadim.rf.gd/zilejuboxi.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/64485449142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2457a5c2-1881-48f5-82f7-332583aa45ea/acurite_clock_manual_13022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c07d0bf-a7d7-4e9d-99f4-f2eaa4746607/xebasesebukevagakevet.pdfIn PDF document text
    • http://norevevada.rf.gd/31395337312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f37ecd5-e8c4-48cd-a0c2-765afb2f72c5/56569757210.pdfIn PDF document text
    • http://wilafeduzavedew.epizy.com/60987544783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd5c9c6-8145-4ce0-82fb-41af8a2ff662/96259611654.pdfIn PDF document text
    • http://foliminuga.epizy.com/how_do_you_use_pampered_chef_rockcrok.pdfIn PDF document text
    • http://gegukisakewomo.rf.gd/mancom_report_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/fejeb.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/tofebowuvomotuxifirukop.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_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 5368 bytes
SHA-256: 3bec1567ce001ca73a7939769f2ca74646053aa1d1590774bf605ecd853185ec
font_01_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 10800 bytes
SHA-256: 5c363bd9b94e930d981baa5d2aee6c93fedf63ca1185f91b4a2209df70e77c90

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