Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e140197a62c11c4…

MALICIOUS

PDF

96.2 KB Created: 2021-06-29 05:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d612f863f0f7e4884874cf2f0d424a9 SHA-1: 23497162cdc0d422dc17782d7871ab34f66eac88 SHA-256: 2e140197a62c11c40345b922b3d6be6181aadecf9c8a4027ec1d6c7366a971c4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of many external URIs suggests the primary function is to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d4eb20b79fb0f8a497de344b43b247e0/figilunid.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a139ecf16d2---52763129852.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070e805eb24d---tobubumukidizadapi.pdf
    • https://alshamiltrading.com/alshamilfiles/file/wigolaruderifanalaj.pdf
    • https://dynasty888.com/image/files/20210531_033340.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb15dab8b8---jerijuxixodewajetaguwugen.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/8bcb0877495851a81d98f98d9ce0e865/zajujalejebinota.pdf
    • http://haustechnik-hagenauer.at/wakunenuveza.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/2d950a69fc3d99d7ae9c232e2cac1097/fotidibajab.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/422d5b46114ca1c53679b7d08e2c529f/kejabokemururizupuwu.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/3536075642.pdf
    • https://psychologgia.pl/Upload/file/sinojisivapezovigamagedet.pdf
    • http://jucal.es/images/file/46241592515.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846a374ef95---5394676392.pdf
    • https://vestol.bg/files/file/46866622061.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/l6uc1vr0cqnvq9glto6t031sgp/45128728407.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/fdec7028f7067845da1c652b2900cdf2/netudepepovot.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/cc93f0f786c9a5f658a18376996d8a75/navivowujuvalikojobaz.pdf
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/65650261002.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077f2d8cfbe4---11049101447.pdf
    • http://hanasushichoice.com/uploads/files/xezupevalurosuxa.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607262c8b1503---67187093033.pdf
    • https://wisserarm.nl/app/webroot/files/userfiles/files/43294808167.pdf
    • https://nic-irq.com/userfiles/files/26163394909.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160838379914a9---16196404042.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=robbery+bob+game+hack
    • 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_off00011806.bin
e678ad242f9238c6e840d22e1cb5e2a7fbd3097b32aa22ca2241e6c03136693c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11806 10560 bytes
font_01_sfnt_off0001302b.bin
fd137d562d6d6b3ec0106eb750f31636c925f7b4450a195fa699bae2135516c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1302B 17008 bytes
font_02_sfnt_off00015bc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC4 16792 bytes