Malicious PDF — malware analysis report

Static analysis result for SHA-256 932179fe57172e6e…

MALICIOUS

PDF

83.3 KB Created: 2021-03-31 15:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab0fe7fa97aaf57c203116468962a7f4 SHA-1: 28cc37b9de8ae4f57ed838f24c70aa29c025ce46 SHA-256: 932179fe57172e6eb221d55f37f9b7da0d2ff5128a078f9f0cb3b7eaec12a046
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in link farms for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=bakery+business+plan+template+pdf
    • https://torurukiruxo.weebly.com/uploads/1/3/4/5/134529807/gunurufamov_ridekor_bumopevawu.pdf
    • https://ziwegakesamud.weebly.com/uploads/1/3/4/4/134468237/lufelun.pdf
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/xafiz.pdf
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/wawiwofawuze_rokikudixaxi.pdf
    • https://mizavuzozubex.weebly.com/uploads/1/3/4/7/134730625/nogixoxo-sijibuta-turunitabowusi.pdf
    • https://zububeto.weebly.com/uploads/1/3/6/0/136082076/juzowutodipu-gawukukefex.pdf
    • https://linulozaf.weebly.com/uploads/1/3/1/4/131437298/rabirarov.pdf
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/silopetik-wokipozewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_10f06d99823a49bbb43a78bedc671b0f.pdf?index=true
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_e5286846d78f44e2ac1d3e2fc11d1e5d.pdf?index=true
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_06e75c3ace264322b77c2da6d2d0dce4.pdf?index=true
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_023a6854dbf941a688f3d2f0604fd9f8.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_626c81414c674f7cb22dc57277406eb1.pdf?index=true
    • https://3d1db4d0-c196-4dd3-8d5c-bb108cafbd43.filesusr.com/ugd/479e38_a19a9a9df09948359ca6ec706c7883f8.pdf?index=true
    • https://s3.amazonaws.com/verirejon/what_does_the_emerald_tablet_symbolize_in_the_alchemist.pdf
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_97ca04136f57475b8680f623ec9bb57f.pdf?index=true
    • https://s3.amazonaws.com/lunojol/82712633117.pdf
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_201b1dbc57ab4d0db501864d9667a224.pdf?index=true
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_d495fdb96a734d59a4c2653c79f97529.pdf?index=true
    • https://s3.amazonaws.com/robumuduluwise/kuvunidawesekig.pdf
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_e3e2c09625d84e099ccb06d44fb2b646.pdf?index=true
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_c2da6853bfb148948d0f70ec6839ffd9.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0c.bin
79907e93ffe05957d7120f8d4b2e9da613547e3fdc25355f43b7593eda998f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0C 5540 bytes
font_01_sfnt_off000101d8.bin
6564e30d75164d52f3d57e2007dfd66f3df003e2e094491c1443501b7d9bb231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D8 10956 bytes
font_02_sfnt_off00012794.bin
30fc2ee1d3c0f3cb8da72a1aee3522d75394ad8837458bf90354c649055702ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12794 16660 bytes

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