Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0cf0175ce315ed…

MALICIOUS

PDF

79.5 KB Created: 2020-12-04 12:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 19c404d0816a92ca3cf8ba8336057d68 SHA-1: 136ee020a8064be5b59a1b4a5e9c7fb2763c91c0 SHA-256: 8e0cf0175ce315ede59f8103133e143bb96c49dad3c02e6cb3f05a9c1d47eea8
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 'https://traffking.ru/strik?utm_term=cloze-ing+in+on+science+organisms+and+environments+answers'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

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://traffking.ru/strik?utm_term=cloze-ing+in+on+science+organisms+and+environments+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_5fa39397aedca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc1cf09f3de5e49b5a72320/1606536969757/jibugetomipo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf7c7b7a66e04eaf45c2a/1606219739281/watch_taken_online_free_dailymotion.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/words_that_start_with_hero.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b82e11f6a419848b6c75/t/5fc42946fa04221c71a30d65/1606691142848/libro_azteca_gratis_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/nupas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc2e711a97599144e57f7c1/1606608659865/running_record_msv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5197abd14ff0dd2b7be46/t/5fc9e0fd1a258d244fe0f8e1/1607065853915/pocket_knife_display_case.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294d0bda9c57a97c8e281/t/5fc44a0161e25426e1c0a58e/1606699523891/wreck_garden_city_ks.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/lataw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc385f1c89e1c4b8fcf14f7/t/5fc6a0e41972c46e3c87f187/1606852836374/xavug.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/82424829230.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/74631747196.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_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 5396 bytes
SHA-256: 1be68974030c1061edc48e4c4d5ce23f79a976cb446a639c934a27c00b94791b
font_01_sfnt_off00010bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB0 10816 bytes
SHA-256: 81f68c058f5b1b42a870c0510ddf483cd9e03f4400a346805c374aecc29bfe3a

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