Malicious PDF — malware analysis report

Static analysis result for SHA-256 444d9da8d2a53d4d…

MALICIOUS

PDF

77.7 KB Created: 2021-08-17 10:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e43c6c8b658a427f993c890c1994c505 SHA-1: e09b30168bae7fcec0e9028797ce1c64a7951885 SHA-256: 444d9da8d2a53d4dc3daf56f69cf446ce52621958665e7a872edb341730e1ea9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://cedule-plachty.cz/files/file/kimusawugasedofixojezu.pdf
    • http://meteosputnik.ru/userfiles/file/74515062021.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/9q7h0p5gfnejaj5hhf4sanfs8n/sipalotirobe.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9bde46fe---tosijuvawekebejujudi.pdf
    • https://kaktutzhit.by/uploads/files/69064185268.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/55e6d8494d69e36f3c98dd750cc2fad3/makomuzuponijeb.pdf
    • http://austral-immo.com/userfiles/files/gabubezug.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd99fb1c9c7---kifuxukaziwu.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1bcd868a7---37589742274.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hacfc6pop3s6p5mgqu380h1kd1/dutogotavimikifumofim.pdf
    • http://circuitvietnamcambodge.com/hinhanh/file/nuganixujunupefisof.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/39f16632b1ad4b200ab49ad9526677f2/32010003045.pdf
    • http://namthangbasaltstone.com/uploads/image/files/loripideredazenubita.pdf
    • https://angkagenap.com/contents//files/lewamipewabisino.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44747ede83---fiximukisewuzokusosiw.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/9711aca71d2cffb9643b4f05eba38ab3/letorekugalonifezabot.pdf
    • http://gerastar.com/userfiles/file/60632979020.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b0a20e44a---92837283535.pdf
    • http://landpas.pl/upload/file/lexavanuwuzikemasewo.pdf
    • http://www.moyekolodin.com/files/74198671388.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608881b2f1a24---lavigupikaberuxap.pdf
    • http://www.olivier-frey.ch/user/web/file/vezifasarivededuvi.pdf
    • https://xosobacninh.vn/webroot/img/files/lajuwamad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=glencoe+precalculus+textbook+pdf
    • http://pro.ovh.net/~tribuene/images/banque/file/rodupeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 16792 bytes
font_01_sfnt_off0000e581.bin
a27855bb750c07c000dc83388e855f63fd9f5e227f988dffec533a7818aad9d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 16152 bytes
font_02_sfnt_off00010f18.bin
c76899df7890ec4341a1bab30ac26255032639c23b09ec80c8fbea4a5fa02cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F18 10992 bytes