Malicious PDF — malware analysis report

Static analysis result for SHA-256 13098db9d32c65c9…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 04:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94c55189e648abbc721f67f89850eb60 SHA-1: 2e89254ef5cd877385d457d71553df7c9d105207 SHA-256: 13098db9d32c65c9aba4564264c5fba2411cd7468f7e0539294f249f1366d0fe
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are obfuscated or lead to potentially malicious content, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains metadata related to PDF creation, and the presence of embedded URLs further supports the phishing or malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/123?utm_term=after+effects+animation+tutorial+pdf
    • http://topsale.pro/clinical_virology9cwxd.pdf
    • http://barberking.best/what_does_5d_mean_on_my_washeru7usv.pdf
    • http://bestsalestoday.xyz/nelenudafukudojuvonazuka6vcd8.pdf
    • http://stavki-na-sport.site/607948041067j76h.pdf
    • https://netiwolofud.weebly.com/uploads/1/3/1/4/131438008/rodeganidasi-puwidumedi-sowabakubewuv.pdf
    • https://latejurudawiron.weebly.com/uploads/1/3/2/7/132740343/fewuwosokipuban_tasuz.pdf
    • http://xitnet.fun/tenuvovepidopov2np5.pdf
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/mafolotufosan-wulumimobupob.pdf
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/wudekomexinewuk.pdf
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/b574aa5a8fddf.pdf
    • http://edalovert.xyz/ala_baburao_ala_baburao_songr20cg.pdf
    • http://akvatehnika74.ru/6294679465lnwl2.pdf
    • https://danatitajovo.weebly.com/uploads/1/3/4/1/134108849/4605887.pdf
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/fuxuzomosaw_zalifajonige_marupirasawow.pdf
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/11c6140e717491.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_0830647c270d4cae9c343d01a5b6a5c6.pdf?index=true
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_4c9b197e4ddc4123903b9909039cb765.pdf?index=true
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_bd112073879247fe846452f6d3d7384b.pdf?index=true
    • https://d3a092a6-6aba-4e73-b2ea-a476a70afb39.filesusr.com/ugd/84a5c6_593f128b30d4415f8bf40cdf92aafd81.pdf?index=true
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_cb347df53443434ca271472a17bb2ed9.pdf?index=true
    • https://9fd063f5-a6e2-47f0-a1c8-15c646e36cc9.filesusr.com/ugd/ee11ea_0e484c85acd84a1a9fead0ea0bcaa0ca.pdf?index=true
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_1085fd20626848749b264d99a76981ea.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e0.bin
a0eb1473034348280761151f94c89f936f73e455b646afd6bbd9fcbb73de3562		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 5172 bytes
font_01_sfnt_off0001025c.bin
d86907f8129dd5be11c373cf0ec88d47e07ca35132a9c77c4886a6f6b97e957c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 10580 bytes
font_02_sfnt_off00012676.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12676 4324 bytes

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