PDF malware analysis — malicious · b7650691f682be18

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 07:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c542c2d919b95dcd92f7b272c70c4c38 SHA-1: 86012ca3d441ed2f6361e3b0d6fe3e7cb28dafe4 SHA-256: b7650691f682be1863e93552a54ad75aae5cbc8126cc626ee5fc81cfa171c598

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://botokaw.ru/wix?keyword=ambulance+drivers+test+answers', suggests a phishing or content-lure attempt. While no scripts were explicitly extracted, the PDF structure and extensive URL usage point towards an attempt to redirect users to malicious content or facilitate further compromise.

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://botokaw.ru/wix?keyword=ambulance+drivers+test+answers PDF link annotation
- https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/458763ed.pdfIn PDF document text
- https://jaroxifapo.weebly.com/uploads/1/3/1/6/131636664/jajezugemijada.pdfIn PDF document text
- https://temevukovekolax.weebly.com/uploads/1/3/4/6/134688950/83dc49e6cf05b.pdfIn PDF document text
- https://fejunula.weebly.com/uploads/1/3/4/3/134363834/femomu_dasogirug_nizakalupe_gijezurexijeke.pdfIn PDF document text
- https://cdn.sqhk.co/regavebike/gjrjcje/75624375005.pdfIn PDF document text
- https://cdn.sqhk.co/pewesopefim/h9Xicz1/72302112042.pdfIn PDF document text
- https://cdn.sqhk.co/leporolino/RWF2rgi/47729871253.pdfIn PDF document text
- https://maxijegiv.weebly.com/uploads/1/3/4/1/134131269/dawerotovujideru.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/vinivuxo/jenifodukat.pdfIn PDF document text
- https://s3.amazonaws.com/pasawe/revulujapunudagolisi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/12e347be-9356-4ca2-a443-75ec04c04f04/dovugupiwavepuka.pdfIn PDF document text
- https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_24c29b21f30b46aa8c92afc4392e4447.pdf?index=trueIn PDF document text
- https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_7b0471e61d3344088a5d7984e8447c0e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/befarekogol/kowaporefuzoraxasixis.pdfIn PDF document text
- https://s3.amazonaws.com/zuvovoxigumuz/fimiv.pdfIn PDF document text
- https://s3.amazonaws.com/vazisi/professional_cv_templates_south_africa.pdfIn PDF document text
- https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_3eb3e058423345a5b97f83e2e37ccc08.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/05474756-08a3-4999-bbad-1a599304ddb9/laxafepatowixedutaguxe.pdfIn PDF document text
- https://s3.amazonaws.com/gizonukorad/english_literature_paper_1_exemplar_answers.pdfIn PDF document text
- https://s3.amazonaws.com/livivuvuwugeb/how_to_start_my_wood_splitter.pdfIn PDF document text
- https://s3.amazonaws.com/zugutixe/juzapasamugefo.pdfIn PDF document text
- https://s3.amazonaws.com/jixeremipet/adobe_illustrator_id_card_template_free.pdfIn PDF document text
- https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_0b913de51a3e4dbbbd87f47ab5effcd0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tosevud/johnson_controls_annual_report_2014.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2826520-c02c-4783-8a3d-08c6da033a23/mexunuronefiratawaxi.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_off0000e663.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE663	5368 bytes
SHA-256: `15638086b22ae2c66b6f3bcbaecd23675cfd32ce2ca791d0a55b41df1c89b7c3`
`font_01_sfnt_off0000f896.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF896	11420 bytes
SHA-256: `e1a653cb87d2d2a98d2e9d83d78351df95d552036e979b56b4ccc55b35aa3d7a`

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