Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c60f975166c55b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-08 00:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ac380ecc24849d6f8d669ab275f950fb SHA-1: 8607b627938b608a1a29659be3b19edec2c37153 SHA-256: 06c60f975166c55bda9f309937dc175a60e6acf81b7bcb3ec0ed778538edab42
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=factors+affecting+customer+satisfaction+pdf PDF link annotation
    • https://kompaspt1.com/contents//files/74335550385.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/4709055132.pdfIn PDF document text
    • http://chromatographvials.com/d/files/katuk.pdfIn PDF document text
    • http://imaginove.eu/data/Files/22053555045.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/41949244607.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f4ea5afba---70552122448.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/vovemopozexerob.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/990gtv6v4it28ggg4tb7janis1/bazufo.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/zirokaji.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/22424952809.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jcssa2p17s8i2lj4lv5a1tau55/kimulitevigaxuvi.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/15788302046.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/lodudawovumososajavugebez.pdfIn PDF document text
    • http://www.moyekolodin.com/files/34926235798.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/92668084479.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/lejixozapemivawajagusevun.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/pozowojawarazaxuzaxinivi.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/523cbff18d53def378c383e50977425d/ninujovapodatokajiporudeb.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b310b832ec4---1856160311.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/kogubineratuzenoladotemi.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/1622qcr7r05uut9h23n5lmtohb/24203039179.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/bobitakawakafefuz.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/fobuzixavavibow.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 10996 bytes
SHA-256: 0c7db2cba8ebcc04cbeb02ce6e734a532681105e36c75cb63e9282919b7f87fc
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 16324 bytes
SHA-256: b93a4fa19d1c92098d6f990c8e77333fb1f1c3d0657a1441aa7d2760941dbacd

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