PDF malware analysis — malicious · 4df4a39b256deab4

MALICIOUS

PDF

80.4 KB Created: 2021-06-12 17:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 688dd54b117f7e0bd71998f43a92e251 SHA-1: 530f2513675b364d06504bd7da5ed20f04a852de SHA-256: 4df4a39b256deab48a5c4e65c4c0782b67db4d385e9dd4f3f06171181f29b234

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://krisoc.ru/pbw?utm_term=electric+weather+boost+pokemon+go, is likely part of this scheme. The document's structure and the presence of numerous external links indicate a phishing or malicious redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://krisoc.ru/pbw?utm_term=electric+weather+boost+pokemon+go PDF link annotation
- https://kedixezowudogaj.weebly.com/uploads/1/3/4/6/134618790/3513304.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374532/normal_601153928a38a.pdfIn PDF document text
- https://lobepujijas.weebly.com/uploads/1/3/5/9/135966441/pakepixonavisaz_mamanorawutuw.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479679/normal_6014d7f135fcf.pdfIn PDF document text
- https://tuxenovizomojow.weebly.com/uploads/1/3/7/5/137516496/sumetazawini_nizidego_davojomo_dozukemidov.pdfIn PDF document text
- https://rewajugelawuz.weebly.com/uploads/1/3/0/7/130738764/5baf36739ac.pdfIn PDF document text
- https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/4209797.pdfIn PDF document text
- https://piziwola.weebly.com/uploads/1/3/1/3/131382430/b6d0efc75340bb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384484/normal_5fd8444ba8002.pdfIn PDF document text
- https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/0a70521.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453579/normal_604b068e96d9c.pdfIn PDF document text
- https://gigorevexi.weebly.com/uploads/1/3/4/7/134714530/bufanuxasunekadisu.pdfIn PDF document text
- https://tosojeravi.weebly.com/uploads/1/3/4/6/134617838/47e0da2b9461b0b.pdfIn PDF document text
- https://temazerezeveleg.weebly.com/uploads/1/3/4/7/134763385/sesita.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385198/normal_606606c10e034.pdfIn PDF document text
- https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/479724.pdfIn PDF document text
- https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/8796588.pdfIn PDF document text
- https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/5418096.pdfIn PDF document text
- https://maposege.weebly.com/uploads/1/3/1/3/131378999/rageguxip.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4369507/normal_60b5025e8f81b.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
- https://uploads.strikinglycdn.com/files/83f7a3eb-901f-44bf-bf28-b2f2d7108fab/resnick_and_halliday.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b175b286-cef2-4ffd-bb21-0ad9a02ff382/the_planets_jupiter_piano_sheet_music.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97fb69cc-fce7-403b-b517-72860f7e006e/how_to_use_upper_arm_bp_monitor.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_off0000ed05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED05	5388 bytes
SHA-256: `f471af96763149d4c36f0a53bb628e47dcd2d0356ceadaab5d398c01529c96c2`
`font_01_sfnt_off0000ff36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF36	10916 bytes
SHA-256: `a61a09d2fc469f0f237f22c578bbff628168ba1caad51ec1b1c5488f405ce895`
`font_02_sfnt_off00012443.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12443	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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