PDF malware analysis — malicious · 0089c3dcba194115

MALICIOUS

PDF

50.0 KB Created: 2020-11-05 16:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: c8f9e7af6f44733aecdbfa9d297268c7 SHA-1: d4ec4745236624aa51062a215496fc37d72493f6 SHA-256: 0089c3dcba19411571ecb410ff88605061a55d79b8bc9643dc490f80beda1cee

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or SEO spam. The ML classifier strongly indicates maliciousness. The presence of a download button lure further supports a malicious intent, likely to redirect users to a compromised site for further exploitation or malware download.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://trafffe.ru/123?keyword=free+trailer+lease+agreement+template PDF link annotation
- https://figotuzu.weebly.com/uploads/1/3/4/5/134579221/lulifale-takikinib-junebene.pdfIn PDF document text
- https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/a8633ac31f.pdfIn PDF document text
- https://puliwavigajog.weebly.com/uploads/1/3/4/4/134469254/8c7eac7.pdfIn PDF document text
- https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/8832817.pdfIn PDF document text
- https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/tojajosoripadin_koniwixowabafa_lodod_dakesukexevime.pdfIn PDF document text
- https://rasagarus.weebly.com/uploads/1/3/4/4/134452949/8364cc207f5d1c.pdfIn PDF document text
- https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/levefodil.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
- https://xuvaguwofivopi.weebly.com/uploads/1/3/4/4/134463587/kakuv.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://uploads.strikinglycdn.com/files/b656d10f-494d-4e84-89d4-216dbb1e6b8d/18430169794.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ae3361ab-35db-486d-a236-e290d2803c53/parrot_coconut_water.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/017757e1-f792-46f6-8fed-93bd42dbeafa/86449321403.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f36e9b30-d915-4764-b50f-6f1138ab7867/jewoxewalaletolo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/21fbf97f-1193-433a-bf98-66d7061c8f9e/27505384691.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fe2abfe4-bfca-497f-8a44-1f26e39465e6/kagerozaso.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/4578/9606/files/gaxazunene.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/29db2b7f-0faf-41c9-84ab-ad8e451c1f53/62134824240.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4628/0609/files/62786870043.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_off00007812.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7812	4772 bytes
SHA-256: `a3902769dd1a0848ebb42838b96b72a5b5a1303df30289603f60773adbff3da3`
`font_01_sfnt_off0000881f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x881F	10744 bytes
SHA-256: `b721d0f487b3b5806607c9fecce325c9b4cca81f6bc42564889f1e99bec8fddf`
`font_02_sfnt_off0000ac81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC81	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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