PDF malware analysis — malicious · 0f64e0bc5663ee3e

MALICIOUS

PDF

81.2 KB Created: 2021-05-01 18:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: dbe391718a09a8226c18ae31929feb9d SHA-1: 5c93745d5d800136818e0a63c0eddbdb06040157 SHA-256: 0f64e0bc5663ee3e16cd6b47590435138d750e75222c102a26c592ecee1dedb6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to potentially compromised CMS upload storage, suggesting a phishing or redirection scheme. The presence of numerous URLs, many hosted on what appear to be compromised WordPress sites, reinforces this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://amitadevnani.com/userfiles/file/31125049049.pdf In PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085092f0bc30---98652902902.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160770436196f2---87164337742.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c7b2cf4aa---tawesobimawaniregitajeki.pdfIn PDF document text
- https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160848bc605402---58294804517.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085250b3eab2---36008707873.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0b233751---16347325594.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3cb1b39e4475d05aa93cef8c41f3a69c/vivekiru.pdfIn PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/e32a9c683a58fadadda9c4cc625e1651/50693149634.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9051aa2a32883b6117de7b206bc9a3a4/javadusoguvo.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608505a88ca52---tobofuvoxogenodezis.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c136e2ce97---33962276864.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784a23526f1---sulokut.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/hr73c4crotq1bm547q23kct8bg/18628522351.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/04055bcdcf88986ba740ea88ac03e33e/zudemopoxes.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ad62fd6a59b8d5ccff82c971ba85728/gufafi.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=android+emulator+error+x86+requires+hardware+accelerationPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE66	5800 bytes
SHA-256: `183849f81537e221fd8189632064ad1b4c0405b8cec6f87e336e105f825793b9`
`font_01_sfnt_off0000f20c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF20C	15180 bytes
SHA-256: `e05b90e2c47548af9822986b4d8aa20854cb31eb98706b96a51b58413743646d`
`font_02_sfnt_off0001222b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1222B	16060 bytes
SHA-256: `eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df`

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