PDF malware analysis — malicious · b4b03b96d754c72d

MALICIOUS

PDF

69.2 KB Created: 2021-01-19 06:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: 20deb62d68b9274a977d23858a9c3b6d SHA-1: 1d70936735dd15e2b4f21cd3396f87c671a13c01 SHA-256: b4b03b96d754c72d79feb4e17c5ef08cd3f821a3df0f7dc2111f79325feb6002

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of numerous embedded links, including one pointing to a known malicious redirector, strongly suggests a phishing or malware distribution campaign. The document's structure as a link farm on disposable hosting further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 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 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.
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://gettraff.ru/123?utm_term=shark+navigator+user+manual In PDF document text
- https://zaxonoso.weebly.com/uploads/1/3/1/3/131381259/c1c4795be64fde0.pdfIn PDF document text
- https://jotevugujuz.weebly.com/uploads/1/3/4/6/134675951/lifezejepufolab-milewuvufax-maluvumotamuv-bisel.pdfIn PDF document text
- https://likojekiputisi.weebly.com/uploads/1/3/4/5/134576895/nixifopimoviw.pdfIn PDF document text
- https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/9b3b618e4acdb38.pdfIn PDF document text
- https://cdn.sqhk.co/gikasiful/UhbBFm9/checkers_pizza_trumann_arkansas_phone_number.pdfIn PDF document text
- https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/a20151794cd2.pdfIn PDF document text
- https://cdn.sqhk.co/seruribemoju/bhbiehb/yandex_browser_apk_download_for_pc.pdfIn PDF document text
- https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/nawobakana_beziru_sazilevuvafigif.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387808/normal_5f9c391dd690f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478951/normal_5fa99c82d204a.pdfIn PDF document text
- https://site-1166600.mozfiles.com/files/1166600/31199472659.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473916/normal_5fca05b6a4967.pdfIn PDF document text
- https://xagixuruzetel.weebly.com/uploads/1/3/4/3/134319769/8100034.pdfIn PDF document text
- https://site-1173807.mozfiles.com/files/1173807/alien_warfare_wikipedia.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495043/normal_5fc7ef68380b1.pdfIn PDF document text
- https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/88376b62815.pdfIn PDF document text
- https://venefenotufawu.weebly.com/uploads/1/3/0/7/130775800/tuwafisufumuji.pdfIn PDF document text
- https://site-1168202.mozfiles.com/files/1168202/best_barbecue_sauce_for_pulled_pork_recipe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d3a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3A2	5324 bytes
SHA-256: `5bc8725cb66e3db1b6c951d55d84e8e7aecbf8a1c7c6043009210abe667b676a`
`font_01_sfnt_off0000e599.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE599	10060 bytes
SHA-256: `33a8dd730ced19caf513d1ab6e072815b400a8393ff80d0421c83bc1221a3395`

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