Malicious PDF — malware analysis report

Static analysis result for SHA-256 346ff4f9e510de52…

MALICIOUS

PDF

101.1 KB Created: 2021-08-03 08:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b2c06cffbc435ae1a1e9c85fca8d04b SHA-1: a22efb54c5778c122435efbf9e5c025fb42cea40 SHA-256: 346ff4f9e510de52c906b5c94926796329c0275ba5e74e109cd73d274c342cd5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites, indicating an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609f362aad330---litazadibuvipisom.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/hq4j6aosh4q1sdu6nkdm36c7ud/mitiwosezebuxido.pdf
    • http://soflocops.net/clients/81266/File/wutebipo.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160986264b5166---98150767364.pdf
    • http://redhillplantation.com/clients/1/1a/1a02e1fabf1298af97853074613e4b20/File/52632529321.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af7bf83f534---89975872113.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f12adb7b16---wabovefa.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/7dkrvb8g0jum8p4rpjus6kgf2r/vifexido.pdf
    • https://aymsoft.us/aym_image/files/dekatubowovoxajamev.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc0dbd116e---silutejelafi.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607446df58140---famemotagamokogagivoba.pdf
    • https://dolcezzecaffe.it/file/masogezutiguxamitojiko.pdf
    • http://autosklo.sk/pictures/file/zogozesetono.pdf
    • http://bobiniauto.com/userfiles/file/pozamoxijibuv.pdf
    • http://nexxosrealty.com/userfiles/files/21700356989.pdf
    • https://ready4use.ru/uploads/files/kevizorobepati.pdf
    • http://bloodfaces.de/attachment/file/banitarir.pdf
    • http://hurtowniagrafit.pl/userfiles/file/38245577967.pdf
    • http://bioident.pl/photos_fck/file/7020708704.pdf
    • http://fotossc.pl/_files/file/xipepakabosenogigafi.pdf
    • https://win-win-keiba.site/js/ckfinder/userfiles/files/zosodofoxeneforezat.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ers54r3terq082c2ma8gls6qbj/47918240382.pdf
    • http://dailitara.lt/bites/uploads/file/popibaju.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/hvg3hor6aus4t5dcas4gt39c26/kubegozezijamufu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+did+the+invisible+man+first+become+visible+meaning+in+hindi
    • 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_off0001262a.bin
7c17bf920e87487e76d26e923ffc51c6d25a697fe98028873cc99035dfe56486
pdf-font-stream PDF embedded font (sfnt) at offset 0x1262A 17012 bytes
font_01_sfnt_off00015231.bin
b846526eb8cd8e9e9206a88a66828bf7d07867d811b614a5f242a97af88ef2d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x15231 11204 bytes
font_02_sfnt_off00016c0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C0B 16792 bytes