PDF malware analysis — malicious · c26c2f7a94e581e2

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 06:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 8f2cc41d35e835da56737d691359b1ad SHA-1: e2e8922b02f2ec4ba50f9d364c068914d6e3802e SHA-256: c26c2f7a94e581e20203016168647525ffeee574d73989ce6aa6c73c8221f45e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign, likely using a spearphishing attachment as the initial access vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9946

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://wastran.ru/uplcv?utm_term=the+art+of+war+niccolo+machiavelli+pdf+download PDF link annotation
- http://www.tomasjelinek.com/img/pub/file/83027075412.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9608ad4c1---51589197384.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/43j4pum31bnhqvun9k4c24k4j1/9223000349.pdfIn PDF document text
- http://mppscstudy.com/admin/usercontent/file/zeriwezi.pdfIn PDF document text
- http://elitaliaweb.it/upload/file/60164847496.pdfIn PDF document text
- http://trendybiz.in/usersfiles/file/84150295603.pdfIn PDF document text
- https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/hfqv9vndba4lggqt2j06e6r4nr/80441804115.pdfIn PDF document text
- http://thedewakohchang.com/image/upload/File/esib.pdfIn PDF document text
- https://rjpexport.com/files/fisoverafiwejuwijeb.pdfIn PDF document text
- http://niszczeniewaw.pl/userfiles/file/43856728276.pdfIn PDF document text
- http://hart-metale.pl/gimnazjum/userfiles/file/daburilorizenoxanozuw.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f491f022---wajifefijopunilatixixore.pdfIn PDF document text
- https://beautyyaurient.com/editor_upload/file/37899605299.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/b41e5052b5c6402d048b626a0555f72d/88645960223.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe656e96d---78421869327.pdfIn PDF document text
- https://icbacademy.com/upload/files/ditukajexasunifozokenuk.pdfIn PDF document text
- http://trivio.it/userfiles/files/xusarigixizevoxuj.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a17f4617510---dabonomejidi.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/j3fqloojuef3f0echm814ddeql/52445827960.pdfIn PDF document text
- http://comlark.ru/userfiles/files/86256535931.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/nazumujovuzasaxovofa.pdfIn PDF document text
- http://devitohomesorlando.com/userfiles/files/loxefapomoz.pdfIn PDF document text
- http://shopgraeagle.com/ckeditor/uploads/files/zokaxukivawedibevike.pdfIn PDF document text
- http://hongdanhaudio.com/luutru/files/37144852480.pdfIn PDF document text
- http://chrislahoda.ca/userfiles/file/58676277176.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_off0000d94b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD94B	19472 bytes
SHA-256: `9b14344efe5cf1ba5faaf76834ddc08149378d6a25e1369279534a74baae842b`
`font_01_sfnt_off00010c5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12472	10832 bytes
SHA-256: `d711648159731085aeabbfe7c3a28bd96463f0ef69a8ee07da9f49eecabe14d7`

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