Malicious PDF — malware analysis report

Static analysis result for SHA-256 599e358f645a5455…

MALICIOUS

PDF

76.2 KB Created: 2021-09-14 15:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 636d4031802fba98b2f2fbb2b597325f SHA-1: a849fcc2efaa37265d0526ec2f7c6b8dfbb29b55 SHA-256: 599e358f645a5455f99b38f911d7769e94b8084ffcadfcabb31af9a0308aa293
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely for malware distribution or phishing. The presence of external URIs and link farm indicators suggests an attempt to exploit user interest in pirated content to redirect them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://wastran.ru/uplcv?utm_term=a+quiet+place+part+1+tamil+dubbed+movie+download+in+isaimini PDF link annotation
    • http://aasghsflqsae.handylover.com/upload/files/73614020555.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/bazuzulaxo.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/kepapowekuzulowo.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/tofiguwavakovafoj.pdfIn PDF document text
    • https://isosklo.cz/uploads/ruwiferupawedimifi.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6ec3a5a6---35011595538.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/27111416362.pdfIn PDF document text
    • http://nova-auto.com/upload/mevemezilebag.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360126e1b9e---66905552001.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/xiguzozaka.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613692230b24f---31403828146.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/femuzevejuvidix.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/pinosozavejexeboruzutaf.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/48890965116.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/miwuxigezikuluderovut.pdfIn PDF document text
    • http://hodori247.com/uploads/files/dilomusaxujawanokomegama.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/wilil.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/daferujaweguragabu.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-4/20210904225445692153.pdfIn PDF document text
    • http://leton.pl/userfiles/file/bozagiwi.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/tagodubori.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/635eab446d27a47415de6fc6646b229e/roxupobogowutibe.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fef0acf609---sifuri.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/32605270870.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8fd05ccd5ed4104b6571b949313ea4f0/1683357235.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/vologuvosan.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_off0000c47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47E 11248 bytes
SHA-256: 541123511e1eaba8f72b697d5d30aa79d4ed3e41ac2abcbb3e07ba2cab6bca8c
font_01_sfnt_off0000de88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 16824 bytes
SHA-256: f21ba6ce82db11a8414931c8687058abd833365ea110717f7668bb6a90db0da5

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