PDF malware analysis — malicious · 445928778cfdc568

MALICIOUS

PDF

78.9 KB Created: 2021-04-04 21:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 044fb4980605e6aa638a147951bf7d2b SHA-1: 1d97a713d292f924e765b31f239760437af2bf2d SHA-256: 445928778cfdc568bfe1b97a5c8c4da3a2efaee20860ec3cfa3ab0616384e511

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large link farm hosted on disposable domains, a common technique for distributing malicious content or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to compromised or malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/2478228.pdf In PDF document text
- https://wodarobasuk.weebly.com/uploads/1/3/5/3/135300597/bajeforobitabofex.pdfIn PDF document text
- https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/6382063.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462362/normal_601a129954708.pdfIn PDF document text
- https://kufuwizanulu.weebly.com/uploads/1/3/4/2/134235437/gemigonisol-miguwapabotof-tiveje-turasutarafa.pdfIn PDF document text
- https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/domizogate.pdfIn PDF document text
- https://nagaxubonafebax.weebly.com/uploads/1/3/1/6/131606673/bapofedikiviz-xeretof-diferaxuras-pulebet.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407988/normal_5fee89bac73d2.pdfIn PDF document text
- https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/mixopagewopa.pdfIn PDF document text
- https://xobowosesij.weebly.com/uploads/1/3/4/6/134616182/23341a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481527/normal_604db331e1637.pdfIn PDF document text
- https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/c21e22c.pdfIn PDF document text
- https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/85352d4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489713/normal_602c854569435.pdfIn PDF document text
- https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/4858860.pdfIn PDF document text
- https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/nevifativalani.pdfIn PDF document text
- https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/1768584.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
- http://feedproxy.google.com/~r/wb/ENAH/~3/KjdSuPfhPRY/wb?keyword=craftsman%20electric%20edger%20replacement%20partsPDF link annotation
- https://s3.amazonaws.com/zarelusipofox/gukobatonomezididep.pdfIn PDF document text
- https://s3.amazonaws.com/siwixomudit/74009178278.pdfIn PDF document text
- https://s3.amazonaws.com/ratixifo/93033313565.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_off0000e910.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE910	5176 bytes
SHA-256: `6f93aa37e422f05171da3e5132ac2560bb2987a5c02c30f939d003e26855b824`
`font_01_sfnt_off0000fa8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA8D	10972 bytes
SHA-256: `d20abafd96e621906dd1e7a9429350d2484ea12dfddf04f2637d7f38b0ac4e45`
`font_02_sfnt_off00011fff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FFF	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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