Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f90617846f6c84…

MALICIOUS

PDF

91.6 KB Created: 2021-02-21 11:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9999959f2cf711d0490fd018bb288d3e SHA-1: a66a495875a35eef15315162a6d45bf1474c5a31 SHA-256: 18f90617846f6c843c98c809c0b8981f29ebc18d2a4be14222d392d9059da85b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'https://yafferge.ru/123?utm_term=sims+3+cheats+needs'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=sims+3+cheats+needs In PDF document text
    • https://cdn.sqhk.co/lilavokolet/hfgjvhb/80154589512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ff86f4f9493d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_602a8d536c3df.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/id1jjah/51586962388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_600ba104cf582.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/NjjahiD/woodworking_guide_eso.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/Tjd3sBf/ranked_smite_casual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_60198aa47e2b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414514/normal_5fdd76d0b9f56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464735/normal_5ff7a089c560c.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/hcgdThh/66278466414.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/zfQhhc8/frases_tumblr_portugues.pdfIn PDF document text
    • https://cdn.sqhk.co/fabupiguboxa/3yhawge/singing_in_the_rain_lyrics_romanized.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5ff11da5d8323.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/cWhffgg/19806067264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_600c1584b7d36.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/wujafivabipo/car_collision_reporting_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/57122416270.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_off00012774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12774 5316 bytes
SHA-256: 7e8805e3658fb8842f0072f0c2df4788071daeff59d4f83a1514967121fc775f
font_01_sfnt_off00013961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13961 11800 bytes
SHA-256: df12d2b7ef27d7ab95a00ae834582c27f3e42733663bea5030fb2a81edc47775

Open this report in the interactive analyzer, or submit your own file for analysis.