Malicious PDF — malware analysis report

Static analysis result for SHA-256 58900548d7721a24…

MALICIOUS

PDF

86.3 KB Created: 2021-05-04 07:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 002f83dc68b0c744ee4926b58231c4c9 SHA-1: 1a134b318955b5105c28d09cd0d98b89a716894a SHA-256: 58900548d7721a241a660cba07f09f77a42f6ae637d5f68f669eddc938143810
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://xezojetit.ru/strik?utm_term=filipino+pancit+calories PDF link annotation
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/3560871.pdfIn PDF document text
    • https://gidisapawifo.weebly.com/uploads/1/3/4/6/134611794/sowusuvurovebu.pdfIn PDF document text
    • https://zugudomumomaxix.weebly.com/uploads/1/3/5/3/135324912/farowinesarufo-xitamidepulesi-xuzedoruw-wusukazudemoka.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/kiwusemivemi.pdfIn PDF document text
    • https://beweluka.weebly.com/uploads/1/3/4/6/134694692/ba4414f276f49.pdfIn PDF document text
    • https://wazevavipedad.weebly.com/uploads/1/3/4/4/134484144/8201272.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/6280274.pdfIn PDF document text
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/3410491.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/lebasixesomejulize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekapiv.epizy.com/88327557877.pdfIn PDF document text
    • http://lifuwopokul.rf.gd/movie_themes_for_windows_10_free.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_e6d09df304c040eea66def0606834c28.pdf?index=trueIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_0465dcd88a49497895793f067a3e576e.pdf?index=trueIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_9045fd5542cc48ddaea9be181dbcbbec.pdf?index=trueIn PDF document text
    • http://ninemizojunima.epizy.com/maths_formulas_for_class_11_download_state_board.pdfIn PDF document text
    • http://bemogabidemixu.epizy.com/best_books_for_babies_6_to_12_months.pdfIn PDF document text
    • http://wifotomosif.epizy.com/legifusigamawus.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_76ec845df0f443fc9ce9bd29f5280b7a.pdf?index=trueIn PDF document text
    • http://dimizisunope.epizy.com/multiplying_decimals_worksheets_grade_8.pdfIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_f3bffd26ecce462581fc1be086efd2ab.pdf?index=trueIn PDF document text
    • http://rajixubododafu.epizy.com/binidobe.pdfIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_b7b94281204d4fa5b5c33d0c7b463f87.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_1aa5f71e1f204ba18b95123e47aa2d10.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 4884 bytes
SHA-256: bcd0b52994d4af05b5786e11567450884f2cd4ed8031f3248ae564b9618fc45c
font_01_sfnt_off00010c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C64 12432 bytes
SHA-256: e9c2d791c0c487a95ad88f792f5b2fcb42bef1d2c8a2ca4632f4b381500133b2
font_02_sfnt_off0001357e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357E 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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