PDF malware analysis — malicious · 0bf842f094c8ba58

MALICIOUS

PDF

77.3 KB Created: 2021-03-09 05:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 06e32e768ef71d8a5a8cc43db3e4fd6d SHA-1: e6ab7e7eaee6ef301c22e0d97bb9ea6f1db16be0 SHA-256: 0bf842f094c8ba58de28f686e0e1829fe0fba4527d7180bc8d8ea312b7b73638

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards techniques used to redirect users to malicious sites.

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.
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://jumiwimov.ru/123?utm_term=bitlord+2.+4.+0 PDF link annotation
- http://kernig.store/75127884189iza90.pdfIn PDF document text
- https://lufurazorume.weebly.com/uploads/1/3/0/8/130874109/7491509.pdfIn PDF document text
- https://sifegofariwe.weebly.com/uploads/1/3/1/4/131437131/9228233.pdfIn PDF document text
- https://xemelavu.weebly.com/uploads/1/3/1/4/131437726/xedelofopozizopiki.pdfIn PDF document text
- https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/8961981.pdfIn PDF document text
- http://cocobuka3.xyz/18526253539xkid6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403543/normal_602096f70c371.pdfIn PDF document text
- https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/sojufufodekufafolit.pdfIn PDF document text
- http://olx-delivery.cc/27336290078xc6t8.pdfIn PDF document text
- https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/xefebovedabuwo.pdfIn PDF document text
- https://jexiliwole.weebly.com/uploads/1/3/0/7/130739190/4b9258e828.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4383925/normal_5ffd6530cd56e.pdfIn PDF document text
- http://top-salez.site/imagine_dragons_thunder_lyrics_songofxt8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_a66cc943688a4deb9936f64261bc7029.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/f37c3a5e-48c4-4f80-b26f-6ca77212cfad/how_to_compete_in_crossfit_open.pdfIn PDF document text
- https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_53bcdee73aaa4437b1320d434157bd3e.pdf?index=trueIn PDF document text
- https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_73dbfda9f95d4b51858eee7725f53690.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/5b2b2726-cda1-4494-acf9-60adb805e28d/fonorijenexigotupoj.pdfIn PDF document text
- https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_3e49ce5ce1bb45c1938d02d1270a3b20.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/1fe4e5b1-5744-4225-9777-738e91cbdb09/48938055953.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_off0000e966.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE966	4872 bytes
SHA-256: `0e086a6601a7b9fec8963b397ea95a3cf661ce44b09b300d8e6664974f3298cd`
`font_01_sfnt_off0000fa0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA0D	1800 bytes
SHA-256: `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`
`font_02_sfnt_off0001029b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1029B	11412 bytes
SHA-256: `d33152a6f9db71b33f9f753b5df1bc45d2925bea606f7a446aba04068530b926`

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