Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8d857708826966…

MALICIOUS

PDF

123.6 KB Created: 2021-06-30 14:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63f1f0c7aaf9d432638199d83cac103c SHA-1: cc55d5708a27c33852670253445e278e64b86d9e SHA-256: 4e8d857708826966625d545449ad685dce34fbd088c32c963d69488263aa03c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. This structure is indicative of a phishing or malware distribution campaign, where users are lured to click on links that lead to malicious content. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://omegapizza.net/uploads/files/kemotod.pdf
    • http://aeronautike.com/userfiles/file/narudoxutizixufadademu.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072c7a290804---86543610253.pdf
    • https://brs.jo/userfiles/files/folisaxepom.pdf
    • http://technoculture.cz/admin/upload/file/lunanotevodenozetabup.pdf
    • http://www.centralperdana.com/file/vijivofufuk.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/ade01e07ed93a8c8c383858d94790d23/buwazarezutimebuj.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/44dae94e97c650e57b2353df1fbdb22f/55859978379.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093391f39824---54480813194.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7730f3f60---nufokatikosizebevodaxe.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9814237e7c70b50b0a9896bbdf8e8c5a/50601633994.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bd4da10be70---96939830845.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0872b9b3d---wifavuwiremapisifefimel.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/126b9d320663f3c8f53d180d255b329f/88963761288.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3be00005c8f4b436ca996e790d89f494/mopet.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706635718e5---dodipivu.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1178c24b---nesenidikofulikukakobi.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2eb02edf73cded38919cf9a5446ab08a/54452092840.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7bj3spgab3sv09f04h4mhluum2/witewodawux.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160cd35390b308---nisotor.pdf
    • http://vtaky.sk/media/file/diwupaxeza.pdf
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/molosim.pdf
    • http://etpatatietpatata.com/userfiles/files/99533747385.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f37c5c87---zejesej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bldcl+employment+form
    • 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_off000184b0.bin
f80a7733701d4400dcb6851408a8ae808c4a745e2084c4fcbc54231f11b89f9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x184B0 10524 bytes
font_01_sfnt_off00019ca4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CA4 16792 bytes
font_02_sfnt_off0001b4b6.bin
1ca89314d161c3b341a5dab442806094a0f29dd3d042d4455c0b227d4418bd46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4B6 17304 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.