PDF malware analysis — malicious · ff4c33cfbfa74f7d

MALICIOUS

PDF

74.5 KB Created: 2021-02-19 16:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07

MD5: 3cd805af7e53619e52aafb27a2645289 SHA-1: 05fbf67d0da63b6b4114374785e23880130dbcfc SHA-256: ff4c33cfbfa74f7d8da865e683d9eb67af29f1fee72f2a274388496e3712cb5f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, and ClamAV detected it as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to be related to technical support lures, specifically a 'kitchenaid electric range burner not working' query, which is then redirected through a series of links. The primary attack pattern involves redirecting users to potentially malicious external sites.

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.
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.
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://jacksth.ru/strik?utm_term=kitchenaid+electric+range+burner+not+working PDF link annotation
- https://cdn.sqhk.co/wexufenu/bUwRggg/zisafoxolilug.pdfIn PDF document text
- https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/digofaditugigelepe.pdfIn PDF document text
- https://rugexosijebup.weebly.com/uploads/1/3/4/0/134017508/pigut-kogusirer-bibeb-titubotamubeler.pdfIn PDF document text
- https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/9132020.pdfIn PDF document text
- https://cdn.sqhk.co/tokarikadez/hA2iege/11653974053.pdfIn PDF document text
- https://vixagudidiw.weebly.com/uploads/1/3/0/7/130775505/japugajuvuz.pdfIn PDF document text
- https://fuxugikitoze.weebly.com/uploads/1/3/1/0/131070560/somaxobazoxa-wamafideruv.pdfIn PDF document text
- https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/banakomovivid-lunezewilefimu.pdfIn PDF document text
- https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/2814458.pdfIn PDF document text
- https://tugemizibu.weebly.com/uploads/1/3/0/7/130739278/6930496.pdfIn PDF document text
- https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/murituvipe-toduteduxev-wetivoxiz-garovoz.pdfIn PDF document text
- https://cdn.sqhk.co/suxumeva/hy5iaja/54417177454.pdfIn PDF document text
- https://cdn.sqhk.co/tolononof/haJyLgh/11920810547.pdfIn PDF document text
- https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/nunugi.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/poguvelefa/free_binder_cover_templates_for_school.pdfIn PDF document text
- https://s3.amazonaws.com/babetafaperaxov/alangara_vasalale_christian_song_free.pdfIn PDF document text
- https://s3.amazonaws.com/bojafazes/batman_the_dark_knight_rises_full_movie_download_in_hindi_in_480p.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_off0000d9f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9F4	5168 bytes
SHA-256: `29acc7cb4481ff60027dc66d2ac93b628ff1049de8664ae8cd4a24dacf84db3e`
`font_01_sfnt_off0000eb82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB82	10172 bytes
SHA-256: `f91580aab7fd1ee1f8ab14bea52e7966b0ae52832c3674fb8af4d666e9952763`
`font_02_sfnt_off00010e40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E40	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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