PDF malware analysis — malicious · e79c817f8196b0ad

MALICIOUS

PDF

84.3 KB Created: 2021-07-06 12:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: e59fd0b4cb1027bfda6bc00d17603efa SHA-1: 7269ee3cfe40c1f2ec8f602d85575cd57bcdd495 SHA-256: e79c817f8196b0adf70c06841c8afcd53250dc1c9db43efb658265ac385a4549

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting sites. The presence of 'utm_term' parameters suggests an attempt to track user interactions, common in phishing or scam campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://infrive.ru/uplcv?utm_term=whitney+young+magnet PDF link annotation
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c47461711c---ribasufofodi.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0fbc9067a---19503010116.pdfIn PDF document text
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/sm267mf147q3bpl5ep7utv83a4/42161336365.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcea7e3dcef---nekikenopibitenaluwuvo.pdfIn PDF document text
- https://thinkhigh-tech.com/d/files/27219425304.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c579c8dc5---55092490682.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0654d9b1a---30254842149.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fab32645f---1462246429.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608375aee4683---14809827653.pdfIn PDF document text
- https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/sobtc80p4sjativ7qmnd8j5p5u/finanozo.pdfIn PDF document text
- https://actorconseil.com/files/file/96320372661.pdfIn PDF document text
- http://sbnjl.com/userfiles/files/piraxe.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1a6b96b1b82a3111a9243ff03281778c/40834948134.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d6e92287ae57903e65589a8fa696dfef/fimodimapirawisuf.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/f5d8f6171f079131ac54f95464c47733/ninurowatijan.pdfIn PDF document text
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/d84c22d3b6c10649cf28ffb5bff29162/kajiv.pdfIn PDF document text
- https://bnovum.hu/downloads/94277014342.pdfIn PDF document text
- https://faltprasten12.se/anvandarbilder/70/files/61154468266.pdfIn PDF document text
- http://ahxxzx.com/userfiles/202105/file/bivod.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607921ebb2a87---dipamupaxetori.pdfIn PDF document text
- https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/cb053536caa26f612f1301215f6aabaf/44290826933.pdfIn PDF document text
- https://topinsolventa.ro/userfiles/file/juxemowanajetavi.pdfIn PDF document text
- http://exlluprimebrochure.com/ckupload/files/madivariden.pdfIn PDF document text
- http://jjmcp.jp/userfiles/Image/file/zawagufasavuziwidan.pdfIn PDF document text
- http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1302fd5cd6---divosorojerizopatalu.pdfIn PDF document text
- 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://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_off0000e800.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE800	17348 bytes
SHA-256: `f02533737b3eb1ab97d32b04033bc145bb5079fb353dbc802c0c1f5e0074186d`
`font_01_sfnt_off000114aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114AA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012cc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CC1	10448 bytes
SHA-256: `2225c6f6106f2d5a7a2476c427c0dfb3f3fc56809abef021d9640e1af90e8f00`

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