PDF malware analysis — malicious · 864ac66b7c932a97

MALICIOUS

PDF

78.4 KB Created: 2021-02-25 03:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 97d3f4873a5badfe91dc1d2919a3daa2 SHA-1: eaa24515df7573597883d13cc14c6e9ba1609597 SHA-256: 864ac66b7c932a97026d0c1dca1740cd90bf77710ce0acde08d2e3727a36f06a

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 an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is https://jacksth.ru/123?utm_term=2017+tesla+model+3+price+canada, which appears to be part of this scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing or malware-hosting 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/123?utm_term=2017+tesla+model+3+price+canada PDF link annotation
- https://static.s123-cdn-static.com/uploads/4486765/normal_5fedaa5da19c3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368240/normal_5ff51c040ea3d.pdfIn PDF document text
- https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/fovuk.pdfIn PDF document text
- https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/8569788.pdfIn PDF document text
- https://jopokiwajisi.weebly.com/uploads/1/3/4/1/134108554/xepijan_leluja_tusofojofuma.pdfIn PDF document text
- https://nivosuvadifo.weebly.com/uploads/1/3/5/3/135384950/d2522d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461791/normal_6024384c487d1.pdfIn PDF document text
- https://xibabajawaxas.weebly.com/uploads/1/3/1/3/131398380/delukemosapavu.pdfIn PDF document text
- https://nazigexasuv.weebly.com/uploads/1/3/6/0/136081917/vubadozufixebafogex.pdfIn PDF document text
- https://giduwuxudi.weebly.com/uploads/1/3/4/7/134716719/mijunuvalafevoge.pdfIn PDF document text
- https://penusifobituje.weebly.com/uploads/1/3/4/3/134314418/gevag-pumutaxe-xudas.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446496/normal_60031f321c2a5.pdfIn PDF document text
- https://jaloteke.weebly.com/uploads/1/3/4/0/134096083/dowutixoguzap.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481985/normal_5fd1580d63081.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/zagapaxa/68829358604.pdfIn PDF document text
- https://s3.amazonaws.com/wapabefizosumi/bass_treble_booster_1._1_crack.pdfIn PDF document text
- https://s3.amazonaws.com/wibadinavosunom/vuzixalozanijixojipajo.pdfIn PDF document text
- https://s3.amazonaws.com/zuwimadaneb/50353465349.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_off0000e8aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8AA	5484 bytes
SHA-256: `f52eff2504a046a0e79e5a4bdbea56375e6d5d4baa04aee9a0ae2593beb8606e`
`font_01_sfnt_off0000fb2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB2E	10460 bytes
SHA-256: `7eff7c5584e6bce91c0c888a9086917ec0931ad2d2e86d6337e8de2789b0ab2a`
`font_02_sfnt_off00011e8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E8B	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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