PDF malware analysis — malicious · 6ace5ce6af4f4b9f

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 08:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 175b1e701b97a7c112499dbac3808b47 SHA-1: c17662cda4851f9d37d1b02480c63819fdb78e28 SHA-256: 6ace5ce6af4f4b9f06d5ded33e32301287e413923717593ebc2fe5488bee9dd3

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'seumenha.ru', which is likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a TV guide, a common lure for phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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 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://seumenha.ru/wix?keyword=impractical+jokers+tv+guide PDF link annotation
- https://cdn.sqhk.co/felebamifuk/ihaBLpB/93683567001.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420434/normal_6034ee06b33c3.pdfIn PDF document text
- http://opt15.ru/how_many_watts_is_a_small_microwave3mc9q.pdfIn PDF document text
- http://vigastlens.xyz/25021874818zjal3.pdfIn PDF document text
- https://cdn.sqhk.co/safubuguva/PMsJiaw/48751852519.pdfIn PDF document text
- http://beautysale.site/67248792057wf5mh.pdfIn PDF document text
- https://linugotozoluj.weebly.com/uploads/1/3/4/6/134662393/welomusa.pdfIn PDF document text
- https://cdn.sqhk.co/pemoxeriko/dHyBhSd/lighthouse_point_florida_real_estate.pdfIn PDF document text
- http://epipog.com/21840702794w08wp.pdfIn PDF document text
- https://cdn.sqhk.co/sosobita/avplTPv/63196430689.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368781/normal_602b24a8a86e7.pdfIn PDF document text
- https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/7285083.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457861/normal_601bc5d4cf1ff.pdfIn PDF document text
- https://pizugonuju.weebly.com/uploads/1/3/1/8/131856050/1923771.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414864/normal_601c5cdeb39d6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487201/normal_5fd31c301d6c5.pdfIn PDF document text
- https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/1329608.pdfIn PDF document text
- http://reduslimitaly-official.site/80454595469gtr2r.pdfIn PDF document text
- https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/5076055.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/e25c7ded-5bb2-4a0a-a13f-229fd316e1a5/56769304485.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/624d7fbd-f5b5-4a53-ba67-9b9ecddc8bca/mds_3.0_assessment_schedule.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/244d7822-0b3f-4b42-b60d-8858e568f2db/vuwuwikadotididavojolok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/81e5c8c9-9790-4ac5-81bc-7f81476f6953/65547150017.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/759b8ad2-7d88-47d1-9ca4-5cf5831c6aed/gonurepizevidixepo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/072f8f99-78f5-4f20-b5da-8e2e95227d37/21845552810.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0AD	5532 bytes
SHA-256: `4438d35bc0acb38fafc153fdd365d7b755db5b06fcd91fe9c17d44eebf68e458`
`font_01_sfnt_off0001036f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1036F	10516 bytes
SHA-256: `452be5d9f0a7dc444eed7bcaf705f4da1a73377ea346574c6884b1eed6e9ecc4`

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