Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4453179a4c72a6…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 08:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b1212c7359f0238230767515f15cf8f5 SHA-1: 0574e406cfa2edb09d0b11f83f41622f3b1acf82 SHA-256: 0d4453179a4c72a620b1e73bf3a89cae3322fa6c6dd8910f39acd2401a109bfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and is identified as a link farm, likely intended to direct users to malicious websites for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it functions as a lure, potentially leveraging embedded JavaScript for redirection or exploitation.

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://crewmak.ru/uplcv?utm_term=160+divided+by+8 PDF link annotation
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87b641d957---desaguvekiwexonepuvana.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/7582785164.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c1132807b37---xasibizamaki.pdfIn PDF document text
    • https://angkalaris.com/contents//files/56419947382.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c048ebb09---bubulaxaput.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d49be504f2fd87d82c6ecbfe963f5baf/mekoxivaruxemewedi.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/70982869376.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/2961752579.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/nobigeme.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7fd9f03e---74924135197.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa06327c4e---60025691002.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608443b2b869a---gomagebofulamokugutulu.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/48fea1a44282caca0e9b375f59d29ebf/waxupit.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881fd13f1b4---jotigedolobekisolazoxup.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/70478576144.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/27411289142.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/61953095930.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/99486722486.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/zozob.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/fobajurijemibeg.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/pepugesexelaravapanuvi.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e4a5458c6---28334541287.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/pigupafa.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/patejamoruzeravosomifiru.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_off0000e203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE203 18020 bytes
SHA-256: a498e39ca9ef0446a6f98ae2fdd5bebe1ae9f07225fd4d9af15f0ba18c2f9e63
font_01_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 10216 bytes
SHA-256: d0cefb8242323b2099e61f5fe2f1bfb4b8fb711dbeaa75330d5482d88b4c0c9f
font_02_sfnt_off0001276c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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