Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf020555588900b…

MALICIOUS

PDF

77.1 KB Created: 2021-09-07 12:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 78184745f2bd9a2c4cc3e3466340fb8c SHA-1: e91f33e60416261943ac10d567f6ed26921f68c1 SHA-256: baf020555588900bfd045ed68013120b506417c795e025a73ce3f2935cb82abb
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains, likely to redirect users to malicious content. The use of UTM parameters in some URLs suggests an attempt to track user engagement with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://laborke.ru/uplcv?utm_term=obesity+and+cancer+pdf PDF link annotation
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4b67c3331564d98ac3a7719af6dcdcc7/pofibovozexamanim.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6b381d40---lumisog.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0343dc75cd---wulilunudal.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/94454515034.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106fe7497a1d---makivowexufosupazokidimep.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4rflbfnk9mf5fgp1h78ii2hk6j/pukaf.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/lurutufufitunisaw.pdfIn PDF document text
    • http://hak-al.com/resimler/files/84676309207.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/7kv7k6uc5t0kqfksqlfpfbcbon/nonaxefuvodeduv.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-22/20210722144941433520.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb31a26c2c---fexasikokajetoluluvig.pdfIn PDF document text
    • http://adveotec.com/img/file/37681674158.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/50433464087.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/30642093801.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf17f467230---mifumonada.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/biput.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/13267923278.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/v4n3bjqgm3nn6h87vlg8jg9go3/vapomokewu.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/fufefanij.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/8248574519.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7bfa57a69a54d9a80399c5a12a2f3e02/78411273841.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/zowogifutenofopobegafetar.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/lagefibasifumawogal.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_off0000ca4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4B 10728 bytes
SHA-256: ba0650174b3955b74f11a1c05f9616ce30ce06b5ea49ed1ea8f3adbc5c4b5779
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 16868 bytes
SHA-256: a06fd4441a116060469644c95484e1372d0e929e5733cfeef826e06ae1856dd5

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