PDF malware analysis — malicious · b31ec07d0ec0361a

MALICIOUS

PDF

154.8 KB Created: 2021-04-29 14:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: a3cfc7715707c425c28f5a28d6372758 SHA-1: 6c5fbe4a322357aebe590964f33dc1aa2da614b1 SHA-256: b31ec07d0ec0361ac47faa99b03b042561d46f2477d46f60bd2af79184783c7a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to a URL that appears to be a redirector for search terms, suggesting a phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious intent by identifying a link farm on disposable hosting.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 5

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 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://pelibifir.ru/strik?utm_term=halo+books+in+chronological+order+2020 PDF link annotation
- http://mifirejetevina.getenjoyment.net/64078257444.pdfIn PDF document text
- https://jevokave.weebly.com/uploads/1/3/4/2/134266272/5025178.pdfIn PDF document text
- http://xapowuxif.mywebcommunity.org/luzazikopemoze.pdfIn PDF document text
- https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/wekilunulemetu-mapumonoge-narufaxug.pdfIn PDF document text
- https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/b3907b869a611c.pdfIn PDF document text
- https://betataniboluwi.weebly.com/uploads/1/3/0/9/130969090/lebobopuwef.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://najepesirezamuz.rf.gd/methemoglobin_formation_hypoxia.pdfIn PDF document text
- https://s3.amazonaws.com/midaguvimabof/bafawobuxiri.pdfIn PDF document text
- https://s3.amazonaws.com/bizamesuwepe/70781568997.pdfIn PDF document text
- http://parisexubuvi.rf.gd/how_to_charge_nikon_d5100_without_charger.pdfIn PDF document text
- http://lozekav.epizy.com/39322932760.pdfIn PDF document text
- http://kadoxosin.atwebpages.com/download_novel_ceros_dan_batozar_free.pdfIn PDF document text
- https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_5f14718a449642b3a2c25214e4e04ef3.pdf?index=trueIn PDF document text
- https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_49d8d001b5f6462cb889fb7d7da617e3.pdf?index=trueIn PDF document text
- http://menaronutex.epizy.com/95889186821.pdfIn PDF document text
- https://s3.amazonaws.com/jasadavebaga/antalyaspor_yeni_sezon_forma_2019.pdfIn PDF document text
- https://s3.amazonaws.com/sepawi/74627420559.pdfIn PDF document text
- https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_8480a1072b9b4455846783a7ba6b72a4.pdf?index=trueIn PDF document text
- http://kuwitabetegipo.myartsonline.com/serudurajososirujenurot.pdfIn PDF document text
- https://018ae6bf-5b6e-4bf7-bb5f-89503284f855.filesusr.com/ugd/b7931c_f13f13b914ca431a9a0637dc9a82fc10.pdf?index=trueIn PDF document text
- https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_52f698650b134eed96d36d5181933262.pdf?index=trueIn PDF document text
- http://xawavejemefo.epizy.com/bushnell_tour_v3_jolt_manual.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00020ac1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20AC1	5640 bytes
SHA-256: `119d221b66ff9946d1ad05878ed3496001e023d95ed05895103632befff7acc5`
`font_01_sfnt_off00021de2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x21DE2	12124 bytes
SHA-256: `f90b8f11aeff2c577e5a9469796ce90a66771240a68558c567178901d6f992d2`
`font_02_sfnt_off000246f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x246F3	16376 bytes
SHA-256: `069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c`

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