Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b8589a98cf9436…

MALICIOUS

PDF

88.2 KB Created: 2021-09-03 20:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 60784883dd304566d5e75358f00de0e3 SHA-1: 6ea4053708a092dcdbc3c8f4ee91954c177836f4 SHA-256: 86b8589a98cf94361ae3871707d09431e0df4a70767dcb8e211fdc15824c97ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' reinforces the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://drafthe.ru/uplcv?utm_term=pestle+analysis+of+nestle+pdf PDF link annotation
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/mokosiwezo.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nbffpb4pqa2bqjr1fnnhrb2etu/zekokafegegekulezir.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fd59a40bd---wizabelidivosasasamoj.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/70556425225.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/zoxazozowetonopape.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/13521144af5909b138d1ed30d59e028d/lazebofupemag.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/fitixogovupugosazekos.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/5380042147.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/47708970564.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/13692430088.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/79580275042.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/97890810681.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac45e8da93---36095713166.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/155075a5dd890a916e57038fb7c6c020/fudabojofud.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a78a421b4---jolelif.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/rimenudakofumozosok.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87b7ef07fc---migakaduxupe.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/34981535662.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797507292b1---52988368005.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/3fe36aa638e219349efe486c2b8f7021/33286332410.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/zodilenixosuloxuwak.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_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 18084 bytes
SHA-256: 71b6c75a756c29d3b29e050e9b4c527fe6f4f30abcee8e68924c2160c5d9c53a
font_02_sfnt_off00013b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B33 10504 bytes
SHA-256: 74a51020ae8d65f49cbca621a0425f22a88cc067240a774e438492b07e986c11

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