PDF malware analysis — malicious · 2d7001eb9e5069ae

MALICIOUS

PDF

87.9 KB Created: 2021-06-05 07:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 17479bbdaba76d38512ef6b7aaabc813 SHA-1: 5280070c3b1cee78004d689ec60e65e04dff7c1f SHA-256: 2d7001eb9e5069ae765d97476d95d9f77b78af4ab9f03e44763804471390bc44

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM firings strongly suggest this behavior. The embedded URL and the nature of the links point towards a phishing or malware distribution scheme, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://xezojetit.ru/123?utm_term=appellancy+ios+12++free PDF link annotation
- https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/vurodaxobasebut_tarazapukewun.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424376/normal_60260737cc60a.pdfIn PDF document text
- https://xomepuwosabagef.weebly.com/uploads/1/3/0/9/130969083/8522667.pdfIn PDF document text
- https://bifagawu.weebly.com/uploads/1/3/7/5/137512270/9717409.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453537/normal_600e5e4e0a72e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496001/normal_5ff5d1accae37.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382631/normal_6066df1c720bc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405206/normal_602bafbbebd57.pdfIn PDF document text
- https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/bavanerorewupoziwuw.pdfIn PDF document text
- https://dufeduvu.weebly.com/uploads/1/3/4/4/134481569/4671066.pdfIn PDF document text
- https://tokarakuwo.weebly.com/uploads/1/3/0/9/130969339/1569003.pdfIn PDF document text
- https://xusikezawijuxop.weebly.com/uploads/1/3/1/4/131407227/kudat-fiduw-malexalaxudobu-poninodemizem.pdfIn PDF document text
- https://dowawogikisusos.weebly.com/uploads/1/3/5/3/135323483/79f8810.pdfIn PDF document text
- https://laregokirula.weebly.com/uploads/1/3/0/9/130969776/7ea9e689.pdfIn PDF document text
- https://beredixe.weebly.com/uploads/1/3/4/7/134762790/batasedifavezumavavu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405899/normal_60542bb1adcc0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415046/normal_600d8366c7a8b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495976/normal_604ae75c7481c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458839/normal_600dfd65e02eb.pdfIn PDF document text
- https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/3525085.pdfIn PDF document text
- https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/3591955.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://xoxafepapesu.pbworks.com/f/nscdc_shortlisted_candidates_2020_for_physical_screening.pdfIn PDF document text
- http://fadoposapat.pbworks.com/f/chicharron_de_cerdo_informacion_nutricional.pdfIn PDF document text
- http://sonopewobu.pbworks.com/w/file/fetch/144580041/b90_sports_music_watch_instructions.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000127a0.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x127A0	17576 bytes
SHA-256: `da745abe34256b991330f5ab9a77b92b865ea2f69743edaccd34a7acd77614b8`
`font_00_sfnt_off0000f14c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF14C	4992 bytes
SHA-256: `92b16b2ed1571c7fc2a1c481f50266013117c68241482b04001bbb2cb835ca77`
`font_01_sfnt_off00010251.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10251	10836 bytes
SHA-256: `5bc17a28a823dd7ebcd9c16718bc0e674277db006411a4d7f63c2d8bb064c0fa`
`font_03_sfnt_off00014224.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14224	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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