PDF malware analysis — malicious · a77036819db7d7f6

MALICIOUS

PDF

78.0 KB Created: 2021-02-27 22:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 3c9557ce23b64e1d82e36b6c948ddaff SHA-1: b30285c124488a4887f6171cfb2554a5564643f4 SHA-256: a77036819db7d7f61baabb27353ade17f0a58981935cdc9b8d754d2b3f36888d

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://dugedepap.ru/123?utm_term=zoom+5350+cable+modem%252Frouter PDF link annotation
- https://cdn.sqhk.co/fegadosijete/eGjgWhg/high_density_cross-_linked_polyethylene_foam.pdfIn PDF document text
- https://cdn.sqhk.co/dusivubeleza/cxgcfe7/detisanujofolavu.pdfIn PDF document text
- http://nakalabaxis.mywebcommunity.org/fovevovigijazinotamewosa.pdfIn PDF document text
- http://navevukosuso.mypressonline.com/john_deere_316_worth.pdfIn PDF document text
- http://xuzerujagojagip.scienceontheweb.net/new_sales_simplified_summary.pdfIn PDF document text
- http://mamajan.space/cuanto_galones_tiene_un_metro_cubico_de_aguacd5lw.pdfIn PDF document text
- https://jawuzomave.weebly.com/uploads/1/3/4/6/134660074/zerurufesuj_xotixeba.pdfIn PDF document text
- https://cdn.sqhk.co/xukerejolar/QhctifF/dungeon_keeper_mobile_dreadstones.pdfIn PDF document text
- http://gakagebir.mypressonline.com/32929066430.pdfIn PDF document text
- https://cdn.sqhk.co/vojeruzujuzi/9gfghid/28440034917.pdfIn PDF document text
- https://cdn.sqhk.co/rovujesox/gBahbhb/first_programming_language_to_learn_for_beginners.pdfIn PDF document text
- https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/1f10555c2.pdfIn PDF document text
- https://cdn.sqhk.co/rutisifelom/EAzSMjf/silver_dollar_city_talking_christmas_tree.pdfIn PDF document text
- https://raxaregos.weebly.com/uploads/1/3/4/3/134363135/3462638.pdfIn PDF document text
- https://cdn.sqhk.co/naritiba/hjb51gj/sakisif.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://gosaduzunake.myartsonline.com/dell_optiplex_gx620_cpu_price.pdfIn PDF document text
- https://s3.amazonaws.com/wemazun/all_mathematical_symbols_and_definitions.pdfIn PDF document text
- https://s3.amazonaws.com/zonivezada/sikirisirisosuxu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e48f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE48F	5200 bytes
SHA-256: `56eb8e945002f52bfad18ac9efe175bfc97c15e18a409520ec414f122f553ab2`
`font_01_sfnt_off0000f63b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF63B	11176 bytes
SHA-256: `db21702a710ed0812727cbcc51dd26d3847bf77f42a4bf10dd7ac2f8760ec734`
`font_02_sfnt_off00011c3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C3A	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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