PDF malware analysis — malicious · 58651fe424b4def1

MALICIOUS

PDF

85.5 KB Created: 2021-04-28 19:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: ed84528aa80d19abf438f569e9c7f46e SHA-1: 7bbd56d86d5b50fbceac4a99e88d43f01066224b SHA-256: 58651fe424b4def1fab0b05ea92f285d6985301bb8bf6cc7c24ec5fecf4b1749

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector pointing to 'yafferge.ru'. Another critical heuristic flags it as a PDF link farm, indicating a large number of outbound links, likely for SEO manipulation or to distribute malware. The document body, though heavily obfuscated, contains text related to 'whirlpool washing machine parts online', suggesting a lure to entice clicks on the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://yafferge.ru/strik?utm_term=whirlpool+washing+machine+parts+online In PDF document text
- https://cdn.sqhk.co/darekomeguv/whauYjh/90237640593.pdfIn PDF document text
- http://50offstore.info/xilepedunasulovageseiqmjz.pdfIn PDF document text
- http://cardio-natural.info/non-verbal_reasoning_practice_test_2yjj5b.pdfIn PDF document text
- https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/pixubaronagox-mafagi-taxuvi.pdfIn PDF document text
- https://cdn.sqhk.co/lixipadiwel/jcTd3hi/90965484785.pdfIn PDF document text
- https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/gotunikosinizojuti.pdfIn PDF document text
- https://putusura.weebly.com/uploads/1/3/1/6/131606782/bamakogosukigivex.pdfIn PDF document text
- http://gramnews.xyz/xovorazipadigujq0nc1.pdfIn PDF document text
- https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/migotuvo.pdfIn PDF document text
- https://cdn.sqhk.co/jubawiwa/gcjOMpO/capture_the_flag_rules_pe.pdfIn PDF document text
- https://cdn.sqhk.co/manoxixo/chchh5M/5068479111.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/liwafo/tinufugab.pdfIn PDF document text
- https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_72cf3e284bee442f9a23590346ef3eac.pdf?index=trueIn PDF document text
- https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_bbdc3d9de46c4bfcab7abfa24fd31707.pdf?index=trueIn PDF document text
- https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_b8efa18ce56744dcaf16075ca1f62417.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zafirawit/adjustment_program_for_epson_l210_free.pdfIn PDF document text
- https://s3.amazonaws.com/jitimesolagun/94203900179.pdfIn PDF document text
- https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_9b3e25ed4ae947bfa409a54b8eb3859e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nuvukivaxiren/japan_guide_edo_tokyo_museum.pdfIn PDF document text
- https://s3.amazonaws.com/retobifulipo/72003475524.pdfIn PDF document text
- https://s3.amazonaws.com/xapota/24605219550.pdfIn PDF document text
- https://s3.amazonaws.com/lejivugeleguwod/zunoxoze.pdfIn PDF document text
- https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_cde56b79c2ba44cf9936ac5356c5656f.pdf?index=trueIn 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_off000102b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102B6	5240 bytes
SHA-256: `9a598b004f65db0cd2b17f6bc03fd48eba03f6166a512a8ca83ec8bad328217a`
`font_01_sfnt_off00011462.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11462	11032 bytes
SHA-256: `8a3b9faa454027147cb1070472493b02c72bbec90e23cb302fc168e720697ee8`
`font_02_sfnt_off00013a28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A28	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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