PDF malware analysis — malicious · d21d836d24a5fc81

MALICIOUS

PDF

72.7 KB Created: 2021-05-08 18:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 9b1909df0752cbd2809f4fe3b1d29d6a SHA-1: 5dd5e60c85a6795aa86f8e9f4ac558636b1012d4 SHA-256: d21d836d24a5fc8148fe3bc742e469eef089fca1f9791e0fce65d53ca5f99ee7

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://xezojetit.ru/strik?utm_term=how+to+forward+phone+calls+att', is presented as a lure to direct users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=how+to+forward+phone+calls+att PDF link annotation
- http://fujozed.22web.org/zusipezirotegibo.pdfIn PDF document text
- https://cdn.sqhk.co/rasepotobami/aIK24Om/78208222943.pdfIn PDF document text
- https://cdn.sqhk.co/nefakovuwot/ijcP7cL/guilty_pleasure_thesaurus.pdfIn PDF document text
- https://cdn.sqhk.co/lagusive/gjhclie/oreo_icon_pack_saurabh_gupta.pdfIn PDF document text
- https://cdn.sqhk.co/waketeni/dTghhe8/best_mexican_made_cowboy_boots.pdfIn PDF document text
- https://cdn.sqhk.co/fasixazijaz/hhaEEEo/viwuwivolaliwof.pdfIn PDF document text
- https://cdn.sqhk.co/retagigimusa/jw0hige/34295119572.pdfIn PDF document text
- https://cdn.sqhk.co/xidatelo/jgPHjjh/2132348814.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://s3.amazonaws.com/wixanarer/catering_menu_costing_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/papuja/1200tc_egyptian_cotton_sheet_sets.pdfIn PDF document text
- https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_f19dda1b8e5543ee941d930fe11c78b1.pdf?index=trueIn PDF document text
- http://vuxawov.rf.gd/waiting_for_godot_download_full_text.pdfIn PDF document text
- http://fefekug.rf.gd/operational_amplifier_objective_questions_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/lolijexejomak/79642786492.pdfIn PDF document text
- https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_e985a2b7358e44f58b9ee351fc10cc65.pdf?index=trueIn PDF document text
- https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_9fd8e4bf79dc47a184a06817bf8265f7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/divelikubapiwaj/vazarawojetesimawibofini.pdfIn PDF document text
- https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_de0f260829e742fcb05948ec98d780a0.pdf?index=trueIn PDF document text
- http://pugomifo.epizy.com/36671856522.pdfIn PDF document text
- https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_248f48fd3c934e6eb242aa254d7023a0.pdf?index=trueIn 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_off0000d0be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0BE	5036 bytes
SHA-256: `3f154a00cd899ec3733d8eb3b62e872d3c1cd64d4af0ce4ca4dcdc03da7ba148`
`font_01_sfnt_off0000e1e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1E1	10840 bytes
SHA-256: `8aeebc93004ad7e1a71f61c800f917e4378c1846060a170ca73a63ba6880a166`
`font_02_sfnt_off00010720.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10720	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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