PDF malware analysis — malicious · f7d901a70ebb9767

MALICIOUS

PDF

87.9 KB Created: 2021-07-06 08:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16

MD5: 132d672b88231f90b583c928f6e96fe0 SHA-1: ea729780a598668efad26ee287603f3ec5a56e04 SHA-256: f7d901a70ebb9767b62d2f42d2ac8dc9e9c8e8393f195fcea8580960b14560ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external PDFs hosted on various domains, many of which appear to be compromised or disposable. The presence of these links suggests a phishing or malware distribution campaign, likely using spearphishing attachments as the initial access vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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://ketchas.ru/uplcv?utm_term=tactics+for+listening+download+pdf PDF link annotation
- http://m2m2design.com/userfiles/runodenadi.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/75316088345.pdfIn PDF document text
- http://przedszkolenisko.pl/userfiles/file/62149271970.pdfIn PDF document text
- http://udmvdpo.ru/images/files/25705571065.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e7d9f75e575f8c72b734284ff532ff5e/pufapika.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1c36f141331f5ec0716b196df770614d/42589637703.pdfIn PDF document text
- https://albawadiroad.com/userfiles/files/9272725742.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/0f8184484c756d88bc3fa4ffe99dbc7f/gasowewalaxenasitodisawuj.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710440b8d13---1260176694.pdfIn PDF document text
- https://pasarangroup2.com/contents//files/79956513772.pdfIn PDF document text
- http://mariekevanvlierden.nl/survey/userfiles/files/mabogifadi.pdfIn PDF document text
- http://foto-klub.dk/userfiles/file/25771271539.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160809a47328a5---59074258165.pdfIn PDF document text
- https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/gve660e79t4i82t461f9vd2vnt/xemite.pdfIn PDF document text
- http://iaestedresden.de/userfiles/file/3024566815.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/4b1faf90ad161e806c621038a47591c1/vudujuwibupe.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/c62bc442f154db92f3ffd3a1d8b15372/zewirugabexutikop.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aeed3cd12f---65148394259.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609412a130bd2---mekenagebi.pdfIn PDF document text
- https://ivanamihic.com//files/rotofivaxabapekebofadowi.pdfIn PDF document text
- http://manilag.com/FileData/ckfinder/files/20210706_0241641DF0A9FE35.pdfIn PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/l9ioq0rufonbhb57bjv4k24hrd/71901330442.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608835cb93849---vorirogukurejuxiva.pdfIn PDF document text
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/750uknpl832ofg8qtnd8bjllr0/89126638189.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d4c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4C8	16080 bytes
SHA-256: `b1c6688c4117b2eb132fe321d6e5c0cba7066824bbd4880a4905979a2499efec`
`font_01_sfnt_off0000e9ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9FF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010211.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10211	28080 bytes
SHA-256: `4667d9f1fcbee671c562debed5378a4f380b2051893bc524c8d5fbeb316ff82c`
`font_03_sfnt_off00013891.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13891	10844 bytes
SHA-256: `b4f8c2012a5ec530ec0938b9d1d7aca15f196b281eee6f344a65fe55dea6b688`

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