PDF malware analysis — malicious · 2021b163e9f8d296

MALICIOUS

PDF

81.7 KB Created: 2021-04-28 08:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 2fd37c670d9834a1a020a616ef75930e SHA-1: bbbf37cf3a8febaedbb13d95a54820685f86e23d SHA-256: 2021b163e9f8d2965ecd87939ca3073c801892c4f207f0039d021e20b59bfbc1

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm for SEO purposes. The primary lure appears to be 'Twilight saga new moon full movie download', directing users to a redirector URL that ultimately leads to a PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=twilight+saga+new+moon+full+movie+download PDF link annotation
- https://kinamolifurepe.weebly.com/uploads/1/3/2/7/132710726/lopagu.pdfIn PDF document text
- https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/guvenupe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403687/normal_5fd083840ee9e.pdfIn PDF document text
- https://muwefojiginilu.weebly.com/uploads/1/3/4/5/134512592/11c9cdc2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462732/normal_601844312532a.pdfIn PDF document text
- http://blue-tick-central.com/all_formulas_of_mensurationq6fmy.pdfIn PDF document text
- http://goods-amzon.com/wujox2syem.pdfIn PDF document text
- http://matrixbicycles.com/24587768325rdblb.pdfIn PDF document text
- https://ziwopigop.weebly.com/uploads/1/3/4/3/134380455/ab13424ffc45e.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/kovibu/4788525179.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f9ac2bb-41b4-452d-aa37-2897708a7b3f/13912350427.pdfIn PDF document text
- https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_2c8b0bce05c549b9810418412c231d36.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jaxesabi/32500158881.pdfIn PDF document text
- https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_232b548013694ed791d12d1d12436428.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/513b1c98-2e5c-496b-a10a-4ccd8ab1bd1f/mibinijirigexukura.pdfIn PDF document text
- https://s3.amazonaws.com/minaxigevani/ikea_malm_queen_bed_frame_low.pdfIn PDF document text
- https://s3.amazonaws.com/bovenotojitowe/givupij.pdfIn PDF document text
- https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_bfbf8c2da45f48a99171ff34b2b1323c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mujesogi/84697715113.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_off0000f314.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF314	5208 bytes
SHA-256: `b8c22502d36988fba045526cc9d08d0c6b1ac44e8aacdf653e9b873e76b81048`
`font_01_sfnt_off000104b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104B6	11572 bytes
SHA-256: `0bcddd066615d8640741cc688cd6c6e68faf65ad0a5cd56d3bc4b52b5ae1f6cf`
`font_02_sfnt_off00012b87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B87	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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