Malicious PDF — malware analysis report

Static analysis result for SHA-256 22982a169f294b12…

MALICIOUS

PDF

83.4 KB Created: 2021-03-12 00:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 40d01bd2195b6c27d3f010919290a00b SHA-1: 576c9f23786576b09f8c85eea88cd173cb39b734 SHA-256: 22982a169f294b123b00ff57b0af58b373344df4f2b068b6d4a7fe340bb5c760
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. This domain is known to host phishing content, and the embedded URL is designed to trick users into downloading potentially malicious files. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=typescript+tutorial+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_60374cebee0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492875/normal_604009919e792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485173/normal_600668d9e88f0.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/hajarjf/hideous_definition_antonym.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/Xtvjiih/gijunedib.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
    • https://s3.amazonaws.com/vufupu/77968405442.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/fisixafulunujitafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4dc4f5b-dcf6-4aaf-a8f6-c1d773e830af/5_love_languages_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/jonbenet_ramsey_documentary_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2abc35d8-7ea3-4803-93e1-8956e0fa43cb/parigufesukukuxilowajinug.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/najuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/zepotixixovumajowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91146e5-29b1-484d-ae12-aa5ff11a8ba8/bagasetulepezuzew.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/10000_year_explosion.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/28469527322.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/xfinity_dvr_stopped_recording.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/alternative_zu_google_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/jajiv.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/gajogukokepegojudabema.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/nevuses.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_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 5172 bytes
SHA-256: 72f275e8d2d1e5d2addcc6b9ac49a92a71a358c65d6889acde334e3cc557d55d
font_01_sfnt_off00010eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAE 10412 bytes
SHA-256: 48d97c618e693059c8a7901be7d5ab46f9ce6c9aafc8c11fca97d522118b7c05
font_02_sfnt_off00013257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13257 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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