PDF malware analysis — malicious · 775745f8536262be

MALICIOUS

PDF

77.6 KB Created: 2021-03-07 21:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: 4e45d2dc285ba565c91bead5994f5b64 SHA-1: d6e1e55221f96e0c6b921a11bc2b26064b69fa11 SHA-256: 775745f8536262be1474da64aca21dbb9f6ec5d94f002d66e0b85405188eb1da

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple suspicious and disposable links, with a high-confidence ML classifier and ClamAV detection flagging it as malicious. The heuristic 'PDF_SUSPICIOUS_LINK_LURE' indicates an invisible link to a suspicious domain, suggesting a phishing or malware delivery attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent, likely to redirect users to a compromised site or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE

PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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://druttle.ru/strik?utm_term=how+to+empty+rug+doctor+blue+tank PDF link annotation
- http://ygrash.website/17985616054ce5fh.pdfIn PDF document text
- http://coupons2020.info/39069131237j9vso.pdfIn PDF document text
- http://ig-supportcenter.xyz/biotechnology_questions_and_answerssitoz.pdfIn PDF document text
- http://koreatop.ru/modes_of_hydraulic_fractures2vi1a.pdfIn PDF document text
- http://ekzo-fruit.ru/miser_brothers_christmas_song_lyricskp36d.pdfIn PDF document text
- http://discount50.pro/xukupakuxar34s8.pdfIn PDF document text
- http://zatoboyvibor.fun/lettering_guide_tooll92vz.pdfIn PDF document text
- http://potawuzaj.medianewsonline.com/cub_cadet_model_2166_owners_manual.pdfIn PDF document text
- http://jedusajinud.mygamesonline.org/34667487852.pdfIn PDF document text
- http://poverkavoda.website/21471214949jdeob.pdfIn PDF document text
- https://xifuforemavu.weebly.com/uploads/1/3/1/1/131164534/derevo-dexafel.pdfIn PDF document text
- https://midusafamiriron.weebly.com/uploads/1/3/4/7/134702540/kadefeduladi.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://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_f822bb411e29421ea7d1c71716f4f580.pdf?index=trueIn PDF document text
- https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_87ad056ad3374718a98a719e1d8f8bce.pdf?index=trueIn PDF document text
- https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_4e1115a1fc7843c095196a3322255c11.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/b1fa203e-91e5-4c82-b449-d1a8444b5af2/what_is_a_christian_wedding_ceremony.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/061d7483-31a7-40ce-98df-d55ac4a357ec/netgear_wnr1000v3_repeater_mode.pdfIn PDF document text
- https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_9f7901c7ed884441a9f9e72a6a1c74e5.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_off0000e505.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE505	5408 bytes
SHA-256: `d9e85a0c0354cd3526ab2913419626394948a95a43ab6533e156eb34a9bb3edb`
`font_01_sfnt_off0000f761.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF761	10276 bytes
SHA-256: `ecb4f48b98b85a7eb5428925045bef199c3cc9c64d343fe3498eade6fb23c4d6`
`font_02_sfnt_off00011a79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A79	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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