Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ea1ee19bdcdf58…

MALICIOUS

PDF

82.6 KB Created: 2021-04-23 10:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 781ac5ab61a023ee2ff791e02c3bd018 SHA-1: b5c0bd6e15c308f809be8933f56890d5ca372e32 SHA-256: 94ea1ee19bdcdf582ae9c688fc8c878a054d8b305a9aae4cef5bbc2819d9477d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, with one primary URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=old+school+music+listen+online
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/kegozuremuvizox_lanibalovowad.pdf
    • https://cdn.sqhk.co/zanemulazif/gidh5RU/gunship_battle2_vr_review.pdf
    • https://cdn.sqhk.co/mumaxeje/jeHTjd2/wopazepapumemabilebuvekum.pdf
    • https://forajezar.weebly.com/uploads/1/3/4/1/134108615/efe113cbb5f5353.pdf
    • http://tomolijoponix.mypressonline.com/58173762279.pdf
    • https://cdn.sqhk.co/luwibajik/cijccZ1/gapujamul.pdf
    • https://cdn.sqhk.co/kibutonap/COgjirs/mazibixebobuxadazagixa.pdf
    • https://wikoriduban.weebly.com/uploads/1/3/4/3/134341401/xelusuwojaliz-dizaruwigizotin-berilefasexe.pdf
    • https://tisuzibe.weebly.com/uploads/1/3/1/3/131379312/foruximafuji.pdf
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/pewigiraded_tegunavage.pdf
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/967d1fd2478d07.pdf
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/26550ae6644d1b0.pdf
    • https://cdn.sqhk.co/koroxofusino/emwihhf/koxax.pdf
    • https://cdn.sqhk.co/pefatipi/hHgjqjk/flame_hero_mod_apk_unlimited_energy_and_money.pdf
    • https://fozuduwepekata.weebly.com/uploads/1/3/5/3/135320000/rigopizovak_butawisoj_nowefeke_tiweniweferexij.pdf
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_1d72c9256daa42de942170272c9025ca.pdf?index=true
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_59a41201068c438b9eb0b6f5058a0767.pdf?index=true
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_03b19d1f2a8f4119b7a679105caba7ef.pdf?index=true
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_5c1cfa57ee964e199bc045a62dc25d9c.pdf?index=true
    • http://zujakogi.onlinewebshop.net/wogefibewekataninekafuzu.pdf
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_72a47abc47df4779bc9cfd9bbdb0662a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105a0.bin
fb2eb402d970608be4d6e832ba111318891408402b816471ad774b88db195088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 4900 bytes
font_01_sfnt_off00011627.bin
2b8c74cd8a995590004fcef5f9bf38d4dcf3b6cdce9b0932921f00f175311578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11627 11668 bytes

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