PDF malware analysis — malicious · 572c8d94e7a4c541

MALICIOUS

PDF

74.6 KB Created: 2021-04-01 14:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: d58dd375ae1eae7a039df0a6597309d8 SHA-1: ee1030960a140eb581cd936d5b2aba293f737c15 SHA-256: 572c8d94e7a4c541b32fd76d2175912f16a3bbe2b5b19ab3547d50a724df9457

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one pointing to 'https://cdn.sqhk.co/luwesefizi/Dhiuvgf/jajibenodiwufizifeduvix.pdf'. Another external URI was found at 'https://golowaki.ru/123?utm_term=report+hooning+vic'. These findings suggest the document is designed to redirect users to potentially harmful websites, possibly for phishing or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 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.
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://golowaki.ru/123?utm_term=report+hooning+vic PDF link annotation
- https://cdn.sqhk.co/luwesefizi/Dhiuvgf/jajibenodiwufizifeduvix.pdfIn PDF document text
- https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/wonokobetiwanafam.pdfIn PDF document text
- https://cdn.sqhk.co/difakezil/yAMhfji/xevukewi.pdfIn PDF document text
- https://mekegeno.weebly.com/uploads/1/3/1/8/131856852/xitewixiwageburireva.pdfIn PDF document text
- https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/motavasetimikibopeva.pdfIn PDF document text
- https://pakovabe.weebly.com/uploads/1/3/4/4/134442852/6721541.pdfIn PDF document text
- https://cdn.sqhk.co/dutimapo/if6cZ8E/19007787009.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/gupawupigawono/61513567702.pdfIn PDF document text
- https://s3.amazonaws.com/vifusupegiza/what_is_the_role_of_corrections_in_criminal_justice_system.pdfIn PDF document text
- https://s3.amazonaws.com/zumomasugipeno/evaluation_report_template.pdfIn PDF document text
- https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_d312a5bfd8d846b0930c4e4e73a82986.pdf?index=trueIn PDF document text
- https://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_94f8e6d2459048fea23e805f457a9dd4.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xixonu/pivebufuk.pdfIn PDF document text
- https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_6bde6dcdccfe4673b70c40bfcaf6bc01.pdf?index=trueIn PDF document text
- https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_0b13e83e647f455089cadf50c7ec8a67.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wokesabisevo/90682386011.pdfIn PDF document text
- https://s3.amazonaws.com/vajefam/vesugute.pdfIn PDF document text
- https://s3.amazonaws.com/gezizefefififa/chameleon_bootloader_mountain_lion.pdfIn PDF document text
- https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_c4c86d7fc7664871a976804867a7a03f.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nedijowewoded/18705755313.pdfIn PDF document text
- https://s3.amazonaws.com/lezerawe/xapujosul.pdfIn PDF document text
- https://s3.amazonaws.com/wikurixobelu/59767203103.pdfIn PDF document text
- https://s3.amazonaws.com/nilafafakem/spastic_diplegic_cerebral_palsy_case_report.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_off0000dcaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCAF	4632 bytes
SHA-256: `f53e6a9f3deff52009c9d38367bfcf3c350df8a1044613351d93c9970d42c843`
`font_01_sfnt_off0000ec74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC74	10100 bytes
SHA-256: `18111cb499e58ba613f76af6648cabfcd1671ab6ed6df5b855d42f76a898cc06`
`font_02_sfnt_off00010f20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F20	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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