Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54013080033ff16…

MALICIOUS

PDF

80.3 KB Created: 2021-06-29 16:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1baf702271d8af429f714a7713a0073e SHA-1: 068333107070957040414e8570c22c28b34222bf SHA-256: f54013080033ff160e1ad8dde09b49ab919ecb918cb305814cdc8e88ac9e6611
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates the document's primary function is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://coretry.ru/uplcv?utm_term=guide+wavelength+definition PDF link annotation
    • http://cafemsoffice.com/userfiles/files/69369609051.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089f54c404a1---17156205346.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d4b5db1d9---41437191056.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607b294edd933---bunojapotozep.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/44430229190.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/f6ce829cd8c9defe4e2e8681057b241c/26112608044.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/gigobilejaziwukotep.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf59c3eb933---75767927795.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094821677cee---bewepinejuvarijakeb.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed5bb52a60---33952549336.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/loxinomuzapimejejafoxin.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091776993799---sutevudezopalenez.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e17ee5fcb6cc96580d8da2906d8579f6/43791375805.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/298f5l1rjhcrov914nob2lhv26/73862541136.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/51aaf35a365c5805ad2c17d8f0a669af/solidenorebozi.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/rovanidurevadizajisoro.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/givafenederatasexataki.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/bapenal.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/bewizilivemu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7ph3n2i5rau6jc8bv762vkobp2/lojipupe.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/paputeputegawepejoribil.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/t4pc9jvfrp53ea2slh9bvkrdaa/wakazujetat.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xelogid.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://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_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 10656 bytes
SHA-256: 0067f8769a98512875d8705e0fc7af37250106cc9acb0eafb9b08447d5fa3896
font_02_sfnt_off00010d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 17136 bytes
SHA-256: a9f75937e9d22378c017c173d9f6856d9a34414d7adf1b4f59f72f31b5b9a560

Open this report in the interactive analyzer, or submit your own file for analysis.