Malicious PDF — malware analysis report

Static analysis result for SHA-256 132ef56f61623447…

MALICIOUS

PDF

90.0 KB Created: 2021-04-05 23:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de8e650ba93b4fc27cd3ab3516b8b121 SHA-1: 509ed749f61cd2123f7821d590f76add6c047ac7 SHA-256: 132ef56f616234478d63f69518625fd5c18bc990e5130828d172f6a739bcc75e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL leading to a site that appears to be a keyword-based redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/wix?keyword=bush+l+shaped+desk+assembly+instructions
    • http://savineme.mywebcommunity.org/apostila_curso_frances.pdf
    • http://jepenufi.getenjoyment.net/add_and_subtract_unlike_fractions_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4422135/normal_604b2a9b10adc.pdf
    • http://japancar-sib.ru/christian_christmas_crossword_puzzles_printablegb8i6.pdf
    • http://misstourist.info/xowafiwodadugo24wej.pdf
    • http://uchebnoe.website/engaging_anthropological_theoryy99sn.pdf
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5ff55ded45b01.pdf
    • https://cdn-cms.f-static.net/uploads/4425511/normal_60616013507fd.pdf
    • http://potuxoposutu.medianewsonline.com/tonagejebogemisa.pdf
    • https://cdn-cms.f-static.net/uploads/4460070/normal_602726f25807d.pdf
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5ff4cb51b376c.pdf
    • http://prosale.company/tose_naina_lage_piya_saware_mp3_song_free_downloadygmq5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gifiz/xixakiwiwuvogitimoda.pdf
    • https://s3.amazonaws.com/jazuravazaguz/22560272477.pdf
    • https://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_72277238e3ba4f31b45dadcf303eb26d.pdf?index=true
    • http://noperuzibob.rf.gd/speak_now_1_student_book_free_download.pdf
    • https://s3.amazonaws.com/fefurorobumi/que_es_la_cabala_judia.pdf
    • https://s3.amazonaws.com/zemunomipazikez/palamunodabunereratikamex.pdf
    • http://purotowuzogivu.rf.gd/bambara_kannaley_hd_video_songs.pdf
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_d11ffd2274a74695964484fbea369439.pdf?index=true
    • http://dewelimu.epizy.com/bullet_journal_templates_free.pdf
    • http://bogalibamadom.myartsonline.com/fadudusojebegu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001104a.bin
7249a9eb0804f9483ccea13a65a1dc402b0499e3c19b82ee792bad7e40bfef7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1104A 5548 bytes
font_01_sfnt_off000122f9.bin
201189e43671013f4a3de5852e3c5854e1a6cf1b3e02658ad97fcd6222bc9b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F9 12348 bytes
font_02_sfnt_off00014bdd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDD 4324 bytes

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