Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0057629e3029ed…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 15:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 65d11b1dedd216546a1730c4538a4884 SHA-1: ae07ad2fff81d97c1ceaa9ba418c5a41497eea83 SHA-256: 3e0057629e3029edd9f5e4ecc2730ec022e419867d8de70f8e160055c9bdc142
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mn-lawfirm.com/box/userfiles/file/53804898968.pdf In PDF document text
    • https://gancza-yacht.pl/userfiles/file/3134728087.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/duxodalulanedanime.pdfIn PDF document text
    • http://sjccgy.com/userfiles/file/wijadavepefenufuwiser.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/lamaledimuzebijakexa.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/taposifafarizika.pdfIn PDF document text
    • http://apothepharma.com/upload/files/tilisizelivunutusakop.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/19781848068.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/g6vvtrt341lcp1mfblqg7ieta5/tamewemakemasoka.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/juxoxaboluvux.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/81778528763.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/11266311327.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6iu3mfbe9v8bub6bf5n6a8ib37/fopekuzi.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210910150448.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/10336919601.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/77237822089.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/pewuxomele.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/kilumekame.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/59650184355.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/worizuxafokiriloxumud.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/zitizuzubilon.pdfIn PDF document text
    • http://vinmexindia.com/uploads/rifozewapemusunetizijod.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210905_5ED3C77B990AFB6F.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202199755555503.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/3202347692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+change+contacts+from+android+to+iphonePDF 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_off0000d5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F0 11096 bytes
SHA-256: 0d91c4333b867f3f3cc5ca68a7eeac15b9da11c3bbc4238c1b188f789cdddec6
font_01_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 17652 bytes
SHA-256: f777756ce87a940440a0afeeb4121ec31d76da8f4cea5489abf5b17bf80fc43a