Malicious PDF — malware analysis report

Static analysis result for SHA-256 5688ad25e2753c90…

MALICIOUS

PDF

81.6 KB Created: 2021-03-21 08:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b3bc43757b49ff739de37807952d4973 SHA-1: 77493bb066a977c7c823f871e4d4d59eeea3a28d SHA-256: 5688ad25e2753c908c30000bf896e41d281e97e492c951f74b9cf33b91a7c567
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified as a phishing attempt related to a TV show. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent, and the ML classifier output further supports this. The presence of numerous links on disposable hosting also points to a link farm used for phishing or malware distribution.

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
  • 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.
  • 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.
  • 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/wix?keyword=skam+season+2+episode+3 In PDF document text
    • http://phrensy.co/domino_effect_meaning_in_englishoeruy.pdfIn PDF document text
    • http://verifybadgehelp.com/kawutulaxaponizefebawetianb0y.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/28822780743.pdfIn PDF document text
    • http://moscowflowers.online/what_are_signal_words_cite_some_examples56n13.pdfIn PDF document text
    • http://50offstore.info/what_are_the_coso_componentsf3xn0.pdfIn PDF document text
    • http://construt.site/zajulafotaxegibglukg.pdfIn PDF document text
    • https://cdn.sqhk.co/fafovewidom/jcihjat/gary_busey_snapple_lady.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/pifhjji/norokeduxelegox.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/flowchart_meaning_in_hindiefrjb.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hffcggd/51826290498.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/hieHkih/study_tips_for_middle_and_high_school_students.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/Bd0gewJ/andrew_scheer_platform_veterans.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://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_235118b4400a4c9da4241d27ddd122ae.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_8a1e22b6c2114fe3851b000f4ad4ce4e.pdf?index=trueIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_b1d2bb861c264fa391b8525c1694f372.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_4cd1622062e442d0ab95560207a66a13.pdf?index=trueIn PDF document text
    • http://totuxivez.onlinewebshop.net/zegenafufobusitukip.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF311 5148 bytes
SHA-256: cc4458131b87b5085da17356618d750c5ac4e4d677923691ad494fcaeff4c9aa
font_01_sfnt_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 11460 bytes
SHA-256: e2539217713e788abec9cff0a354615ed8aa759fd682540f6d78f21a83e158d5
font_02_sfnt_off00012b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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