PDF malware analysis — malicious · 6bccbe11ca3b129a

MALICIOUS

PDF

74.8 KB Created: 2021-06-11 09:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: d1627b61c64ab2c9481ef7c425aca2a2 SHA-1: 6c1d6a08418b7c4654cfe4c9813749c5775cfd74 SHA-256: 6bccbe11ca3b129a6ba65bd2ca43c4580e868e7bc9bec72b8b3c6c438cdfc5c9

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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 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://huntic.ru/pbw?utm_term=surface+area+and+volume+mixed+word+problems+answer+key PDF link annotation
- https://limifotediko.weebly.com/uploads/1/3/5/3/135325738/1717755.pdfIn PDF document text
- https://diwopoko.weebly.com/uploads/1/3/4/5/134597367/zalimakut.pdfIn PDF document text
- https://wubepina.weebly.com/uploads/1/3/4/7/134721378/bba26.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500665/normal_600ffb97dd852.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446027/normal_6048528a98b6b.pdfIn PDF document text
- https://lasuresupaka.weebly.com/uploads/1/3/2/6/132683400/4483182.pdfIn PDF document text
- https://difodofixipa.weebly.com/uploads/1/3/0/8/130814112/057f7cd5d39.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4493597/normal_5ff305ded42fb.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://xozojonurom.pbworks.com/f/fixuzu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0b6833ae-bd77-4210-a07b-585055f73146/foscam_fi8918w_wireless_setup.pdfIn PDF document text
- http://wepoline.pbworks.com/w/file/fetch/144450453/kepamudowe.pdfIn PDF document text
- http://pulixojesu.pbworks.com/f/cartoon_guide_to_statistics_free_download.pdfIn PDF document text
- http://lojapaveb.pbworks.com/w/file/fetch/144802701/dark_souls_3_faith_build_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bc48c16d-2a59-42dc-88f3-37c7d9680873/what_does_it_mean_when_your_rabbit_runs_around_you.pdfIn PDF document text
- http://ziduzobif.pbworks.com/w/file/fetch/144455172/amiodarone_hydrochloride_davis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d1b6ce8e-ff04-4647-9580-760c8a0f7f84/puzuvetopifeme.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ea5a82f-bae5-4c8c-8221-e5ef4bca27e8/nuance_power_advanced_full_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eca4e2c4-8085-4a7e-ade8-72caa8e92a30/how_to_do_well_on_sat_math_2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/990bccb0-7011-4371-b554-5b4d2a92d186/3037976894.pdfIn PDF document text
- http://pebolokunaz.pbworks.com/w/file/fetch/145022109/riptide_fingerpicking_ukulele.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_off0000d838.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD838	5732 bytes
SHA-256: `6b1ed6d50223549874dcd36f761ea448ff8d0f0597e0f7a6f85b6f0671838137`
`font_01_sfnt_off0000ebac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBAC	10500 bytes
SHA-256: `e072f14b98f5277e31f3828116623d8830356eb23003b231a504331a55323313`
`font_02_sfnt_off00010f92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F92	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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