PDF malware analysis — malicious · 75710a20ea83c446

MALICIOUS

PDF

76.7 KB Created: 2021-04-01 02:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 9ec3e94e0234a47390723a308ff0dace SHA-1: c327db81d5f2afd10fa7444c6c996c0d944780ee SHA-256: 75710a20ea83c446485a3e4f672a049677c05ecdccf3bd5888daa24e2ce610e3

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which point to SEO-optimized URLs designed to appear legitimate. Heuristics indicate a link farm and a redirector, suggesting the primary purpose is to funnel users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/award?keyword=fondant+baby+girl+shoe+template+pdf PDF link annotation
- https://cdn.sqhk.co/nowonipewo/jes4jjN/bukifesegenugefuj.pdfIn PDF document text
- https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/3e5b632cef195b0.pdfIn PDF document text
- https://cdn.sqhk.co/xunalafugapa/nDgjyQl/azar_app_hack_apk.pdfIn PDF document text
- https://cdn.sqhk.co/zewumirapeb/iiiipib/bloomsburg_university_of_pennsylvania_athletics_staff_directory.pdfIn PDF document text
- https://cdn.sqhk.co/fogobewataja/wVhDrgg/43803158911.pdfIn PDF document text
- https://cdn.sqhk.co/zomuzuta/ymBheQe/best_android_tv_devices_2019.pdfIn PDF document text
- https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/206239.pdfIn PDF document text
- https://cdn.sqhk.co/jatobeguji/NTMI4je/sodujava.pdfIn PDF document text
- https://cdn.sqhk.co/nigalasiline/ivIPjDO/bunny_bookends_uk.pdfIn PDF document text
- https://cdn.sqhk.co/xidatelo/xoT4vha/pijebajujifipisegowo.pdfIn PDF document text
- https://pufinixebajev.weebly.com/uploads/1/3/0/8/130873949/lenoziluduza.pdfIn PDF document text
- https://cdn.sqhk.co/gubisagebuto/idFHBib/zobosabop.pdfIn PDF document text
- https://cdn.sqhk.co/zubuwebofe/fgjDgg3/63928225681.pdfIn PDF document text
- https://mepotogi.weebly.com/uploads/1/3/4/7/134737672/6171294.pdfIn PDF document text
- https://cdn.sqhk.co/bumigorawi/giqfiaf/71378022237.pdfIn PDF document text
- https://cdn.sqhk.co/gezubesekar/igncrjb/ap_ssc_marks_memo_2015.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/pasawexawinogad/mbstu_admission_circular_2019-_20.pdfIn PDF document text
- https://s3.amazonaws.com/wopari/jivigekitepovibiseka.pdfIn PDF document text
- https://s3.amazonaws.com/livivuvuwugeb/xidinetisakumeroneso.pdfIn PDF document text
- https://s3.amazonaws.com/jemisajoda/railcraft_rolling_machine_not_working.pdfIn PDF document text
- https://s3.amazonaws.com/xupimaral/24108157766.pdfIn PDF document text
- https://s3.amazonaws.com/vefagotoje/donaxodu.pdfIn PDF document text
- https://s3.amazonaws.com/kudufigunabi/sanotufe.pdfIn PDF document text
- https://s3.amazonaws.com/netinuwa/konokej.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_off0000eb16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB16	5652 bytes
SHA-256: `de8bf9b9e09edda93f253b6648452fd8a07750e79c8b30d48d12436eed87e46b`
`font_01_sfnt_off0000fe25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE25	11668 bytes
SHA-256: `ad8f9d5d46239ddb89d95cc99a7e87afe3bec250d66921f4de709cd7cfa0acab`

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