PDF malware analysis — malicious · 6ec209c2dd5a9233

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 13:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: a42aac0785e3c7be9bfb3287d12bfc82 SHA-1: cae5477db9a18ccef9ffce5692ab05eea0f05bfb SHA-256: 6ec209c2dd5a9233e87488ff73ac684d301840d68a722fddc759a1cc2a3faf2a

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains and known redirectors, 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 links are indicative of a malicious redirector pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://dafemum.ru/award?keyword=blues+chord+chart+pdf In PDF document text
- http://govuled.mywebcommunity.org/74709485719.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4468554/normal_5fec0d2951bec.pdfIn PDF document text
- http://rixujewo.getenjoyment.net/buzulefikoneto.pdfIn PDF document text
- https://benadegerabo.weebly.com/uploads/1/3/0/8/130874398/sumupemeritajoriku.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368478/normal_5ff29f09cd2ce.pdfIn PDF document text
- http://xibawolafubiz.getenjoyment.net/47357930079.pdfIn PDF document text
- http://timelessdecorum.com/zituzajokedukapej8vuhb.pdfIn PDF document text
- http://jaxagogilexet.sportsontheweb.net/how_does_starbucks_work_during_covid.pdfIn PDF document text
- https://minovenuk.weebly.com/uploads/1/3/4/3/134306780/jatozibilizimamin.pdfIn PDF document text
- https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/mafizewiluzot.pdfIn PDF document text
- http://kneeksi.ru/meledugigwei9t.pdfIn PDF document text
- http://xuxijosut.sportsontheweb.net/how_to_thread_singer_201-2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369927/normal_605a724e890a8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420434/normal_5fc57d3c2df34.pdfIn PDF document text
- http://resipowepo.getenjoyment.net/jamaxugibogeposisuge.pdfIn PDF document text
- http://vegifeda.mypressonline.com/lg_air_conditioner_fault_codes_c5.pdfIn PDF document text
- http://raguvigawak.mypressonline.com/31161051769.pdfIn PDF document text
- https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/964ba5f0041.pdfIn PDF document text
- https://xadijonoru.weebly.com/uploads/1/3/3/9/133997446/6969278.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490371/normal_601fa853b9ae2.pdfIn PDF document text
- http://cashbackk.site/7608079616500osg.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://bitines.myartsonline.com/the_paper_menagerie_and_other_stories_kindle.pdfIn PDF document text
- http://mujebik.atwebpages.com/lyrical_ballads_william_wordsworth.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_off0000effe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFFE	5020 bytes
SHA-256: `087e65dfb5eeddb67821e1c84835613300374359a09ed5930d45d959e99a5985`
`font_01_sfnt_off00010126.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10126	11228 bytes
SHA-256: `eb87981199022c7e9320fb360b365086316112140b893477861116e5b1b18078`
`font_02_sfnt_off00012707.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12707	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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