Malicious PDF — malware analysis report

Static analysis result for SHA-256 0770d085346038db…

MALICIOUS

PDF

73.0 KB Created: 2021-03-01 13:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d333ae030afc8e4a71c4306d644f81a8 SHA-1: 2e2422a7efbb5ae601cd18c0abe929ae573ab94a SHA-256: 0770d085346038db92ed91e6d27868ca02654b355b830225511a8cde9d71df50
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting, likely intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of external URIs and the overall structure suggest 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://botokaw.ru/strik?utm_term=data+analysis+techniques+in+business+research PDF link annotation
    • https://lekibuwowobaveg.weebly.com/uploads/1/3/5/2/135295955/wifaterulatamegafun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_600adb326e146.pdfIn PDF document text
    • http://pixubak.iblogger.org/fresco_play_python_answers.pdfIn PDF document text
    • https://zavifojixu.weebly.com/uploads/1/3/3/9/133997579/42eb711f5.pdfIn PDF document text
    • http://tamowigaxijatot.66ghz.com/gozawawozanoka.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/nazasisomawokeromunuwaram.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/sodowa-mikufibivimamom.pdfIn PDF document text
    • https://kimewazokedusa.weebly.com/uploads/1/3/1/4/131454536/45c0e02d9fac.pdfIn PDF document text
    • http://xelonijabi.22web.org/47716652945.pdfIn PDF document text
    • http://gorerusuwoto.iblogger.org/notezumugomi.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/nezanurugega/xowugiv.pdfIn PDF document text
    • http://rarefovukafulu.rf.gd/webuja.pdfIn PDF document text
    • http://belepegaxotimi.rf.gd/29523140387.pdfIn PDF document text
    • http://bajitak.epizy.com/concept_of_state_in_political_science.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_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 5252 bytes
SHA-256: c9a850fc3cb039bb602e00b2c47de2358fd4390b26d7082ce994d6a850cf45fd
font_01_sfnt_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 9964 bytes
SHA-256: 86b7ad8069a79d24257efa5677debb3b0365a1dd405b522e122ca511f39f3021

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