PDF malware analysis — malicious · c5aa694fa37aea07

MALICIOUS

PDF

80.3 KB Created: 2021-09-11 18:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: 24bd1a892f74428fb17457a6db5f02f3 SHA-1: 46611a42e3ea3ef7314857e010b94e4d25c7eca9 SHA-256: c5aa694fa37aea07fb59c34963833d62f2f3a8fff28c867c00b40b2a1ea125d8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. The file contains numerous links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of a link farm and the use of compromised hosting indicate an attempt to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/rimetikaru.pdf In PDF document text
- http://audidalys.lt/ckfinder/userfiles/files/gepub.pdfIn PDF document text
- https://0955205219.jwa.tw/userfiles/files/wakimijadawiwixubuvama.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5b6e3728c034f6a0111d4cc029d4de44/ramepezi.pdfIn PDF document text
- http://bibliotekaludwin.pl/img/upload/files/jefazalodaberogelok.pdfIn PDF document text
- https://mercerapparelss.com/userfiles/files/73636532915.pdfIn PDF document text
- http://kieryk.pl/img/userfiles/file/65339169956.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132cd9f264c9---sopoki.pdfIn PDF document text
- http://www.examnotice.in/uploads/files/88318564034.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356c385c74a---86685229741.pdfIn PDF document text
- https://krantiservice.com/ckfinder/userfiles/files/75455561832.pdfIn PDF document text
- http://traktorpulling.de/ablage/userfiles/files/ragivamutuwi.pdfIn PDF document text
- http://kosmonautika.ee/ckfinder/userfiles/files/91964001425.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/57e86de78925c8c921640354b1f0dd30/46534646555.pdfIn PDF document text
- http://safiorida.nl/operatori/userfiles/file/51012229833.pdfIn PDF document text
- https://digiconelectronics.com/media/33194894225.pdfIn PDF document text
- https://repetitorebi.ge/userfiles/files/lemupifunasawedozasefu.pdfIn PDF document text
- https://easresidence.ro/app/webroot/files/userfiles/files/36879203629.pdfIn PDF document text
- http://bsa-billiard.by/images_from_html_editor/file/pemaxaduxenariwup.pdfIn PDF document text
- https://k31szmq42-nu28.com/contents/files/51097440790.pdfIn PDF document text
- https://nic-irq.com/userfiles/files/70940028318.pdfIn PDF document text
- http://cp-tournament.org/ckfinder/userfiles/files/46370851647.pdfIn PDF document text
- https://epponline.com/mentorfinancial/page_images/file/77960409900.pdfIn PDF document text
- http://gachbinhduong.com/upload/file/14494614100.pdfIn PDF document text
- http://dataction.org/demo/dataction/media/59946740684.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=full+screen+caller+id+premiumPDF 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://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_off0000d550.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD550	10532 bytes
SHA-256: `a1f446c5525010ae23635ef35a9bf263af461733537444f1c1c538d2d0a10cef`
`font_01_sfnt_off0000ed2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED2F	17712 bytes
SHA-256: `2d1731a28263c2780643de56e745ddaa140b961c908be5158000d222478397a5`
`font_02_sfnt_off00011b71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B71	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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