PDF malware analysis — malicious · a596d3d9482fe189

MALICIOUS

PDF

68.9 KB Created: 2021-02-18 03:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 74ea95491db814e85ff1e8ea017aae80 SHA-1: 652f75ee3b130d898a8bb3825ee99b57c9dcf405 SHA-256: a596d3d9482fe1894dfe8c84eaaedd82f88e3763bc34b3d04a9bd417d5f06bc0

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to contain keywords related to ecosystems, likely a lure to disguise the malicious intent of directing users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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.
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/aws?utm_term=how+energy+and+matter+flow+through+an+ecosystem PDF link annotation
- https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/sanebeb.pdfIn PDF document text
- https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/68ef69553c.pdfIn PDF document text
- http://oneplusonemain.xyz/motozosulozodobu8yh64.pdfIn PDF document text
- http://hayatevesigar.online/tebizotev52n5b.pdfIn PDF document text
- https://cdn.sqhk.co/fezemepusap/dhfAPxk/sherlocked_the_vault.pdfIn PDF document text
- https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/baruvifukojigufojobu.pdfIn PDF document text
- http://retoxebed.22web.org/40428731999.pdfIn PDF document text
- https://gemirolav.weebly.com/uploads/1/3/1/6/131606407/05870bbfbb5ec6a.pdfIn PDF document text
- https://cdn.sqhk.co/gijesali/jfibjb1/20486789618.pdfIn PDF document text
- https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/071148f.pdfIn PDF document text
- https://cdn.sqhk.co/bitomasijelo/Oecy4ic/91110071184.pdfIn PDF document text
- https://molisepav.weebly.com/uploads/1/3/5/3/135347716/rodusiwomesujumazuwi.pdfIn PDF document text
- https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/vusenizul.pdfIn PDF document text
- http://hookup157.site/760911511959yfzs.pdfIn PDF document text
- https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/wutivujo.pdfIn PDF document text
- https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/gefoguso.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/lemefofutomapox/rockyou._txt._bz2_free.pdfIn PDF document text
- http://xuzifagavezi.epizy.com/88505265552.pdfIn PDF document text
- https://s3.amazonaws.com/kalanejaxutilif/income_guidelines_for_medicaid_in_nys.pdfIn PDF document text
- https://s3.amazonaws.com/vufupu/57767395567.pdfIn PDF document text
- https://s3.amazonaws.com/wipotegadodorek/toyota_slip_sheet_forklift.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_off0000c5e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5E7	5424 bytes
SHA-256: `bde205a9fcad83a9e6ea54f9ef542f8a9a68178ea834389c995fb9de4a47608c`
`font_01_sfnt_off0000d840.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD840	9308 bytes
SHA-256: `df93147e112dfa05703ac6e94be4c9dd7ea3a27f076345b8df7bb809e17f5c7c`
`font_02_sfnt_off0000f819.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF819	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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