PDF malware analysis — malicious · 95908b8e3a9b6a84

MALICIOUS

PDF

84.8 KB Created: 2021-01-25 12:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12

MD5: a4ae322dadc0bc3b868c651fa23c298b SHA-1: 11af7e252e23bc344fef4f4d905f627aa939b9f4 SHA-256: 95908b8e3a9b6a8477539408206b30ca8aa5f0b7584122b7c752774766b0d8a5

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to distribute further malicious content or phish for user credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://bologen.ru/123?utm_term=northstar+4+reading+and+writing+4th+edition+answer+key+pdf PDF link annotation
- https://cdn.sqhk.co/pazaxefuma/i3hjjbZ/64834601769.pdfIn PDF document text
- http://bobr.space/90345737415wmcgf.pdfIn PDF document text
- https://cdn.sqhk.co/fenazijeguk/iZzbRhe/spooky_sounds_for_halloween_free.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487186/normal_5fe5ee32a3cd5.pdfIn PDF document text
- https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/e5e1630.pdfIn PDF document text
- https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/mibekuluvuwagufikefi.pdfIn PDF document text
- https://pevolevu.weebly.com/uploads/1/3/1/6/131606362/1114960.pdfIn PDF document text
- https://nametipij.weebly.com/uploads/1/3/1/1/131164318/1fd57.pdfIn PDF document text
- http://alania365.ru/51450138316e1w02.pdfIn PDF document text
- https://cdn.sqhk.co/lojosewude/2Vqm41s/bloons_td_6_mods_pc.pdfIn PDF document text
- https://cdn.sqhk.co/fomezawelud/gigfvAa/you_died_button.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4530151/normal_6003c860d828d.pdfIn PDF document text
- https://pebevakulowuju.weebly.com/uploads/1/3/5/3/135323022/1922629.pdfIn PDF document text
- https://cdn.sqhk.co/madumubo/qjhwigR/talion_shadow_of_war.pdfIn PDF document text
- http://hotsgirls.online/rofiretofaguwaxu6eti9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386606/normal_5fe638f08bf33.pdfIn PDF document text
- https://fogorito.weebly.com/uploads/1/3/5/3/135322632/goxisokemapenadopuja.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jedadokuti/gekijexukofuputojame.pdfIn PDF document text
- https://s3.amazonaws.com/xakajoziwibi/goduzatiw.pdfIn PDF document text
- https://s3.amazonaws.com/muvazi/ribbon_banner_vector_free.pdfIn PDF document text
- https://s3.amazonaws.com/sefukirexuwekij/34328423088.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
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off00011abb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11ABB	23292 bytes
SHA-256: `56630efd81bd273d2a52d85b95a7faf6b4e72e72a0fc5197e0ca9f2bb174ca7b`
`font_00_sfnt_off0000e2f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2F3	5588 bytes
SHA-256: `fd51ad5fc474db365feedef6e80e7f6c402cfc28e115054c32c120d70d3cfa98`
`font_01_sfnt_off0000f61a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF61A	10612 bytes
SHA-256: `fec1513df34f1bae6f1016439c8a8230c50004c26b2fd6a469e94163a2c4847f`

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