Malicious PDF — malware analysis report

Static analysis result for SHA-256 3052fe604f1e6d68…

MALICIOUS

PDF

93.4 KB Created: 2021-07-20 04:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2313343ef4860e05b46af3fe91f8d5b SHA-1: 3d817374b9251e315a2fe0ae892e0fd31783302f SHA-256: 3052fe604f1e6d68bba77003b5f0027b4ac4e6fa337fdbbee86b0d84d3780811
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://gulfb2b.com/userfiles/file/tikozurefisivezugo.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/a09b6be2957e94d9c75b3eab0522769d/kivevejuvukowavezakinijud.pdf
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/fizifesuzi.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b53d3caf66f---41942449482.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a00de934b9---36607679490.pdf
    • http://zimaletto.com/uploads/file/38891237456.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/753975e486d643e7d13cf4e54ce7f7a1/lisefebojipewubus.pdf
    • http://www.aportecnica.com/imagenes/editor/file/65747170633.pdf
    • http://guyfamilyreunion.com/clients/41950/File/64790690343.pdf
    • http://soepcentrale-dekeyser.be/userfiles/file/72414033155.pdf
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/55951706405.pdf
    • http://duszek-lasu.pl/userfiles/file/kiruri.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/6eed63f84c3a4fc8844a6357036737fb/sorajowedejivawe.pdf
    • https://musikkursus.dk/userfiles/file/36726124460.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d992e6b44d4---82083675895.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55683552434.pdf
    • http://deforma.it/userfiles/files/rimofamubokigufibafazefin.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f022668a5---95523940071.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713fa0d8976---texiwalejizedijadewuw.pdf
    • http://galettedesrois.hu/userfiles/file/lonavijenukasufeka.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/gakikadurafajawozu.pdf
    • http://changju-hotel.com/CKEdit/upload/files/dirudevuger.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/2oo8m5cc4isj4q0eno23hd362v/nigutodeziso.pdf
    • http://luisacortesearchitetto.it/userfiles/files/57831540192.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607204c18876f---zunusosuxesavu.pdf
    • http://jar-ted.pl/file/56200903221.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=can+you+grow+onions+indoors
    • 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_off00010c7b.bin
1de277040954ac966c1ef606698c9a4f961e55434c34477b598470c52e72fa9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 10480 bytes
font_01_sfnt_off00012439.bin
e4ad8ff7f2b3111e3d42ed0137e2454833221b85d47dabcaeb37eef2967831ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x12439 16972 bytes
font_02_sfnt_off00015049.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15049 16792 bytes