Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e26c79ea4a59024…

MALICIOUS

PDF

91.5 KB Created: 2021-07-20 04:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe7cc04a7e44bf4b62f5fed9aeec98a4 SHA-1: fcc104b559ef621208960c5cb5228ed93fb23cd7 SHA-256: 8e26c79ea4a59024a9311d4e6c4fce5145b22340584f065677e0347dd488fa93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised websites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dietacud.eu/upload/file/tozerazopasokisopunik.pdf
    • https://mobile-translator.eu/app/webroot/media/files/dadulegogimamivobure.pdf
    • http://modnyi-buket.ru/uploads/files/71065886839.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6no8cjq8652pbaffqngd20npe6/jisogiliwafosarofaxuve.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ab8a7c1ea---gopakoxaw.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c187e0666f---koxajifamukisojik.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817677ea053---vilizu.pdf
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/47784392128.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cfcbca292---sipuvufamegozilikofuj.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/24972615770.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/2o2s5ai2sd8mc0isur93mn4524/67790313788.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae353a4040e---58938351435.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a3be135f8---14547270292.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/686d5db699ae975a6deeb725757768a6/jezelavatovonesifonulujow.pdf
    • http://otoozevran.com/resimler/files/23489134143.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608100cf9dd79---dabetakisajunutovawop.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e48debc18d1b533d09fafcfdadfcaf61/73637775177.pdf
    • http://ciccioinpentola.com/userfiles/files/nuriwoladuxeb.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e0ed0d0f4db4191027cc307c291f9d9d/lugenogedaru.pdf
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/22622326526.pdf
    • https://arrayamed.com/userfiles/file/wowixeridafalasegevefodaw.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c75be4af---goxenataliwuxusetileni.pdf
    • https://f-kcc.jp/user_data/userfiles/files/rofulapasalilukunitu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sharon+street+does+anything+really+matter
    • 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://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_off00010346.bin
52da01a8cd4dc19d516557aed7979452b40175b2f6544b22915cc845f720514c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 10884 bytes
font_01_sfnt_off00011c0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 16792 bytes
font_02_sfnt_off0001341d.bin
eba886e80ea8704637e02c5e2b2ae3a8b0f9a23e93d6eb4b577d5b7d7f3bf79a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 17060 bytes