Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1e0565d936fe91…

MALICIOUS

PDF

78.4 KB Created: 2021-09-05 17:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 94419a61d186fd4a9c9f448283e1a8bb SHA-1: 5bbaed919a44166027597c02d3c7f6ce547c3d7d SHA-256: af1e0565d936fe91a74fe1343ee8c771963f56c1be82aa4a2f5cf12e6f6c7ef9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/fa778d0671d7a7574d47571250a57bfc/vutorubuxijalatixizuxu.pdf In PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/40dvl3emhnq8otnhm7pe6pdl7o/21712193655.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/79760357804.pdfIn PDF document text
    • http://tafoto.de/img/upload/files/wedeta.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/raxakemibugejilogepa.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c259ac62bc---fikobikurajaneni.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/31ad881eb6d74e70b8c7e1dac7bb1e86/17149491505.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/50548849341.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/291367197.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b1729640e---89668366848.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/pezabufatuzo.pdfIn PDF document text
    • http://ha-sine.com/d/files/zurevirokiwobilamozi.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607079e273ec4---1020191817.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607188816627a---xapapuzuxenutera.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/vonapafoxelesalo.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/24014734538.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/22213433878.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff7a41c506---95873654718.pdfIn PDF document text
    • https://majubesar.net/contents//files/49634188095.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/17003917012.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/vewujeparupob.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c48797860e01136f137f430fb3302da2/67622390238.pdfIn PDF document text
    • https://jotelek.hu/files/file/75790902799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=sistema+sanguineo+abo+pdfPDF link annotation
    • 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_off0000cabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABF 18128 bytes
SHA-256: 608bbb59623f2731de8a9772c4639d2a1b545c67b4095bf054a95faae3402b18
font_01_sfnt_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001113c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113C 11008 bytes
SHA-256: 93218603cb14f8a1d2e2348377b1880b68bd7ebd5b373d2b77ff723e989399d4

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