PDF malware analysis — malicious · 832ad244d460d4c1

MALICIOUS

PDF

81.8 KB Created: 2021-05-19 20:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: ec4f4c5b03c0a12d021b1c1dee19ff34 SHA-1: 52d67f6b11891b3e6f508366fa75d0fa8548cafe SHA-256: 832ad244d460d4c19d66587186b933c82c4849ed897789bd131fe36004f3619c

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://baarspo.ru/strik?utm_term=how+to+mix+mortar+to+lay+brick PDF link annotation
- https://musixafura.weebly.com/uploads/1/3/5/3/135321149/wimeten.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445331/normal_600bfe896b64d.pdfIn PDF document text
- https://fekujize.weebly.com/uploads/1/3/4/8/134869517/2291894.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466175/normal_6057b6a2a5724.pdfIn PDF document text
- https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/lelebusope.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463528/normal_6026f43c75b31.pdfIn PDF document text
- https://xiwitewikilimav.weebly.com/uploads/1/3/4/3/134371529/6975489.pdfIn PDF document text
- https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/sigakatesin.pdfIn PDF document text
- https://daxulidotuviwo.weebly.com/uploads/1/3/4/5/134597057/5321180.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374199/normal_600d9a7550a8a.pdfIn PDF document text
- https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/nidiw.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459027/normal_6007bcee50b37.pdfIn PDF document text
- https://karinavoru.weebly.com/uploads/1/3/4/0/134017817/9323196.pdfIn PDF document text
- https://zevetokexakap.weebly.com/uploads/1/3/4/6/134640551/ripinirugekajir-movunogedazita-tixivibadibi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427273/normal_5fd0ee4e3f532.pdfIn PDF document text
- https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/xexogig.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/genedonapubefe/15799037939.pdfIn PDF document text
- https://s3.amazonaws.com/nowonovege/akshara_singh_new_song_2019.pdfIn PDF document text
- https://s3.amazonaws.com/gelawiweza/gawexurovil.pdfIn PDF document text
- https://s3.amazonaws.com/tiduro/15345727547.pdfIn PDF document text
- https://s3.amazonaws.com/lomuper/solving_systems_of_inequalities_by_graphing_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/tuxalowafokuvo/harp_sheet_music_uk.pdfIn PDF document text
- https://s3.amazonaws.com/jasadavebaga/35198070045.pdfIn PDF document text
- https://s3.amazonaws.com/zusevamasor/the_seeker_the_host_2_by_stephenie_meyer.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_off0000f761.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF761	5196 bytes
SHA-256: `23e81c767b5657ed6b023ae0cc5d798eb175fae65ac84b1473a2ccadd3be0eb7`
`font_01_sfnt_off00010902.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10902	1800 bytes
SHA-256: `daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e`
`font_02_sfnt_off00011190.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11190	11124 bytes
SHA-256: `0f6ea03fab2266af4a395e7b3a1326502ced10b0ac0e87ec2d2da7899daa44ce`

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