PDF malware analysis — malicious · 8b2cd2d8a70774fb

MALICIOUS

PDF

71.4 KB Created: 2021-02-12 12:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: b60aa6d466712c6a1c266460f6cba3c6 SHA-1: 545de37ba179dbeac033d9cdf9e7ed554b9300b3 SHA-256: 8b2cd2d8a70774fbe824700eb1c52818ed009ebc10c5161f5e47bfe8595a7e42

194 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 0.9996

Heuristics 7

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.
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.
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://druttle.ru/wix?keyword=real+followers+insight+for+instagram+apk PDF link annotation
- https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/zixefa-leredolofutene.pdfIn PDF document text
- https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/folujudopepel-wijixuzibaxuz.pdfIn PDF document text
- https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/ralawowesijanugire.pdfIn PDF document text
- https://betirowi.weebly.com/uploads/1/3/4/6/134661799/wekufigiz-kanasumowib-jufigimugarelur-sariwad.pdfIn PDF document text
- https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/rizugavedate.pdfIn PDF document text
- https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/2040c.pdfIn PDF document text
- https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/9856697.pdfIn PDF document text
- http://wowezixuxaxu.22web.org/cambridge_pet_writing_part_1.pdfIn PDF document text
- http://winelorasagi.22web.org/kojusulisep.pdfIn PDF document text
- https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/7759e582b.pdfIn PDF document text
- https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/laxavojuxeze-nebetararaxozig-solejezup-fakizun.pdfIn PDF document text
- https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/9159400.pdfIn PDF document text
- https://zasoliwex.weebly.com/uploads/1/3/5/3/135318241/26633ed60b.pdfIn PDF document text
- https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/bamopagitafepis.pdfIn PDF document text
- https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/refukelilodexatuki.pdfIn PDF document text
- https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/dfcb2cc9b.pdfIn PDF document text
- https://nudegono.weebly.com/uploads/1/3/4/6/134682657/076963d.pdfIn PDF document text
- https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/sipasirimibiwigewen.pdfIn PDF document text
- https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/popakoxatotusap.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://ruzizoxotawuva.epizy.com/dipokama.pdfIn PDF document text
- http://tojopoxirer.rf.gd/us_army_training_game_apk.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_off0000d961.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD961	5476 bytes
SHA-256: `8da4b995c7d7a7501443a75ae451c97dd33bc0ef2d56d2147d54e861929e9ef5`
`font_01_sfnt_off0000ebf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF3	10440 bytes
SHA-256: `4081ebdbeb339f09f24c20627eb50df5cdb9f53b8e8ea42661d8105f4625a13b`

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