Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d022069726b0819…

MALICIOUS

PDF

72.9 KB Created: 2021-09-19 12:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 72fb867e0751cba8d34ef50f054f9bf9 SHA-1: 79ff999ac48e722c2ca388b773fe2881f1c9eecc SHA-256: 6d022069726b081937235d159254ec81b05e75e73fb6280c0200ab2980e6e28a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=mha+dating+simulator+android PDF link annotation
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16145b9298d091---bexisunemevuvejavabu.pdfIn PDF document text
    • https://suksesunited.com/contents/files/95597863285.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/68472712467.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/kevabubimamisesof.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/tiwuzizaxetawevuguza.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/19386839320.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/wotunapisaxobozileget.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/68845162283.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d10b9014b---petuxerofarulifataxaso.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/zutegejejokuvevev.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/57894009063.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/93016882401.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021090722563373499.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/46837685679.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/vigiledid.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/42686876030.pdfIn PDF document text
    • https://go2germany.ru/files/file/vuromuzubobimubiz.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140d5313edfc---basafev.pdfIn PDF document text
    • http://synphabase.ch/upload/file/37805680882.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/jukinerigusiwirakomir.pdfIn PDF document text
    • https://coevent.ru/upload/files/xodebofopapofaz.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c7a197718---30436523126.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/miteworevabapedepifojij.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/69592777165.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_off0000b9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 17084 bytes
SHA-256: b1faf47b1cef9a0a0461ff819b95570a768aeb3b5c97f3488bffe6df198c9c96
font_02_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 10656 bytes
SHA-256: 9829d2f7df9eeb9dd9159b9d51d62811b2214d7563374ce7963d509a8757dc38