PDF malware analysis — malicious · e8233e7ac4c145ff

MALICIOUS

PDF

109.7 KB Created: 2021-03-23 12:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: aa63043305cc9b80cc2b01cf913607e7 SHA-1: a136a06a500eb67f4450eecb1f0f97dd4e7e448f SHA-256: e8233e7ac4c145ff0f42334d6b4b2e297255c4caec255f13781ef9041209c28b

196 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 an SEO link farm designed to redirect users to malicious sites. The primary malicious URL identified is fokemale.ru, which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://fokemale.ru/strik?utm_term=star+trek+fleet+command+battleship+parts PDF link annotation
- http://securityverifiedservices.com/descargar_libro_de_yunus_cengel_termodinamicag8tog.pdfIn PDF document text
- http://xevedudox.sportsontheweb.net/14679666389.pdfIn PDF document text
- http://starkrobotics.org/59385929119arniu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407331/normal_5ffa1f6f27bf0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365636/normal_602b06ca38996.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473903/normal_6004bf8682022.pdfIn PDF document text
- https://fadurobudafeme.weebly.com/uploads/1/3/5/9/135959894/2295975.pdfIn PDF document text
- http://50offshop.pro/fevidinenelujixivifibe0iear.pdfIn PDF document text
- https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/denobulurasiwu_guxatidaxa_wudojirizu.pdfIn PDF document text
- https://xutawolovunoka.weebly.com/uploads/1/3/0/7/130739399/mopebamumevesines.pdfIn PDF document text
- http://soldatskaya6.ru/when_can_a_child_draw_a_face827eh.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/livivuvuwugeb/meade_telescope_accessories.pdfIn PDF document text
- https://s3.amazonaws.com/fixararololu/tezixir.pdfIn PDF document text
- https://s3.amazonaws.com/nutanigonu/nordictrack_a2350_pro_treadmill_price.pdfIn PDF document text
- https://s3.amazonaws.com/penale/plus_one_business_studies_malayalam.pdfIn PDF document text
- https://s3.amazonaws.com/fupanabivote/langenhagen_weather_report.pdfIn PDF document text
- https://s3.amazonaws.com/xisefowu/vcd_cutter_software.pdfIn PDF document text
- https://s3.amazonaws.com/wanasuvedigo/47169096991.pdfIn PDF document text
- http://nabafutig.myartsonline.com/fluke_networks_microscanner2_cable_verifier_manual.pdfIn PDF document text
- https://s3.amazonaws.com/fuzafuzeruwit/attributes_of_effective_leadership.pdfIn PDF document text
- https://s3.amazonaws.com/lakujusitejojet/85557904899.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_off00015fa7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15FA7	5492 bytes
SHA-256: `72f2ae6a24ee896469ce752b2c052e24f79c5fd5f25b70aa747cffb792a4c9e7`
`font_01_sfnt_off0001720c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1720C	12048 bytes
SHA-256: `6b285460460bda2ea693516987546ec466846036e3222dd8f621ebf3ec45748d`
`font_02_sfnt_off00019b35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19B35	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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