PDF malware analysis — malicious · 39bb50921ca54680

MALICIOUS

PDF

78.3 KB Created: 2021-05-29 21:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 6851db0266f1b87e139804653af93d99 SHA-1: 264c0b427f722cd192b1749635f69c29d2aac086 SHA-256: 39bb50921ca54680327ee09c508e8d8b4292cae0dc3ab6437a2f48eb7e281a66

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document 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 hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to e-Zpass violations, aiming to trick users into clicking the embedded links.

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://baarspo.ru/strik?utm_term=sample+letter+to+dispute+e+zpass+violation PDF link annotation
- https://cdn-cms.f-static.net/uploads/4375339/normal_604462e098df0.pdfIn PDF document text
- https://diwesosun.weebly.com/uploads/1/3/2/6/132695938/7722743.pdfIn PDF document text
- https://mudepazenanaj.weebly.com/uploads/1/3/4/7/134765609/susoruruneda_merudokuzal_dazix.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427284/normal_602ab20d7eb1c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486041/normal_5fc98d6c57480.pdfIn PDF document text
- https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/1216524.pdfIn PDF document text
- https://fonomekaleguv.weebly.com/uploads/1/3/5/3/135308628/litudisasomav.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4465000/normal_60b12c49368c4.pdfIn PDF document text
- https://bupagaxeni.weebly.com/uploads/1/3/4/7/134706040/pepawano_tunasebuzijegu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413108/normal_604a6231c1cac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373997/normal_603e2b6c1f15e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416500/normal_6002d5f43fa2c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457573/normal_5fd627ad7ee2e.pdfIn PDF document text
- https://dovilukimiju.weebly.com/uploads/1/3/0/7/130776072/199283e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424630/normal_6051355e16115.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/de12fe9b-ab51-4048-a651-87abeedc0982/platicas_de_bautizo_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1fb22885-3819-4f71-929a-243c76c97fe3/wevugobepajuxadovizojexa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8fcba0ab-86b7-478c-890c-4706ca22f052/lowewerezopopumoga.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_off0000e95e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE95E	5200 bytes
SHA-256: `529bf3ff6369aab1cac43b9960e5fb8500a139ef9bdcd74ba2b1a30be5fdf31f`
`font_01_sfnt_off0000faf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAF4	10216 bytes
SHA-256: `d0305244cf8354a8bdc28b21143c5eeaab6b13b7dbe2dcd03ff562824065aabb`
`font_02_sfnt_off00011ddb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DDB	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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