Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f9e7a24a860e0e…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 18:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d02c5e7869b50680a3a4ddeba0f55401 SHA-1: 23d6d707bd018cffa364a770271e89dad4501eac SHA-256: 13f9e7a24a860e0e05bf0d06c236e50ce1d79531bf270b751a0a4f6e30edd00e
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple compromised CMS upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://guides2alpes.org/uploads/file/limido.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798d3fcf053---99547553204.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8118d58d2f0d04f41aa2a9e48b27b945/12093357895.pdf
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/74711492618.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2833f643---6185738836.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b5b12b36a50ff8027a09e5480207729/roketotutogodijimexatite.pdf
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/rexewozujinajotefogaj.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/e76131dece1568f5c08ba1cfa359fb26/38334159052.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d6298e32d---43094199118.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606efefbd7237---fonopowiguj.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0297f9a5b6---tugepaxamujenulofojulewub.pdf
    • http://farmaciafoglia.eu/userfiles/files/38104667954.pdf
    • http://anhuifan.com/upload_fck/file/2021-6-23/20210623073421750564.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e320f3a9becae2579fd4076e855cf7ae/liwumebekunezi.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/n2p3ilt2h0g9m82je86gqm7o11/93935511981.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1951d9ee5---bukeresanoretezirafaro.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d54337a1f1d1f82e6fe207278f8241bb/54148774980.pdf
    • http://anvlaw.com/userfiles/file/63700032979.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d889d7d2684---51185489186.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/dh7b57s69rgqrk64qn7616sg2k/90958032282.pdf
    • https://kis-u.com/page_data/file/20210619221514.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/98ec713d44db7eed30ae363d9f550acd/29147134406.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lesemiwinexodezuzabib.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ade88970d99b54cd466f81320ffa171b/43196981023.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4c73760e0---44443574141.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b24640c997c---39790570846.pdf
    • https://lasanisports.com/files/kasumofugabiwabufuvere.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=set+operations+in+relational+algebra
    • 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_off0000ee9f.bin
363ff632304a0094f8cd397cc136861eefd04cb2820d1e14d260f0b144196a26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 10640 bytes
font_01_sfnt_off000106d1.bin
925e337b9ca1c0fe727d65779fff60a0669d27f582b4334d3bd91bd05d75befa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D1 17516 bytes
font_02_sfnt_off00013519.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13519 16792 bytes

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