PDF malware analysis — malicious · b24df69bfdebd5b3

MALICIOUS

PDF

76.8 KB Created: 2021-06-09 22:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 3acec3c174ff67650eb19c94f343cd4d SHA-1: 1332b46eaabe8428b773e8a5122c76819a3e346e SHA-256: b24df69bfdebd5b34e15b8df55b4b8e4c3a5936ec73dc6e442e26327fc1e4d13

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and an ML classifier, including ClamAV's Pdf.Phishing.Trojan detection. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or scam attempt. The primary malicious URL identified is infrive.ru, which is likely used to redirect users to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://infrive.ru/pbw?utm_term=sop+of+analytical+balance+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4446650/normal_5fccd5b2bd2af.pdfIn PDF document text
- https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/porugofin.pdfIn PDF document text
- https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/lovofo-pugukabudib-wadojoro.pdfIn PDF document text
- https://gudufuremozowa.weebly.com/uploads/1/3/4/4/134403830/a5b69f9f3b2e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384652/normal_6053d6f7d7f17.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459060/normal_5fec06db3f66c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388619/normal_60263fad7edc4.pdfIn PDF document text
- https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/rudowu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445331/normal_60281e9b0f663.pdfIn PDF document text
- https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/6367895.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/f8410cc6-a850-49fd-b667-ad7a7e9f66a3/64360706938.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dfe7c3b0-40dc-45b5-8904-0aa69092be21/57020348756.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/349b568d-85fd-4209-99a0-8dd1fcee1ea4/zesiforejefejulagiza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6dbfca32-f1c2-41d1-b32a-a118a5575009/2548204200.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/89be4779-c087-47ce-8612-210399138798/69433964888.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a6b19a0b-8a7b-4ad9-bfc9-1984d8c78aee/how_to_use_a_mophie_powerstation.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/61f60256-c045-4e76-8032-449dc26e8eeb/kesumamotomunexidodalo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b8b09ef4-105d-4670-ac87-0b6877ed4ca5/89926859234.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0a92eeeb-da87-4927-ab3f-43ef7ad38fae/what_are_the_tags_attributes_and_elements_of_html.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a20f1c81-76b8-4b66-abfb-c98ee16c2e07/96209278986.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/53935eec-ee61-48bf-b1fa-448898c43e6c/wojugotopeg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/08f8d2a5-eefa-40c9-ae5c-e754be833b3e/41124889050.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_off0000e22b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE22B	5008 bytes
SHA-256: `a86f4fb35a736febd05edf78345f548b36f1596111234d513ec88da590a9de5a`
`font_01_sfnt_off0000f339.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF339	10228 bytes
SHA-256: `25c470377fa7fd667c1747fac02b1ff36a817a29e973b396399f7c26ae293d24`
`font_02_sfnt_off0001163e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1163E	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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