PDF malware analysis — malicious · 9ed54c1f1698f4a1

MALICIOUS

PDF

84.9 KB Created: 2021-03-30 16:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 84f96603d46e9907183bb5466131302b SHA-1: 2fd0ce4b3ef59fa62ed77041ea12595ffc086a2a SHA-256: 9ed54c1f1698f4a1642053da1ab0c3c932a07c75f1fdec0b37a1b07419d71720

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent URL, 'https://leonvi.ru/strik?utm_term=tp-link+tl-wa850re+setup', is directly linked to the document's apparent purpose of luring users with a setup guide. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of it being a phishing or trojan delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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.
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://leonvi.ru/strik?utm_term=tp-link+tl-wa850re+setup PDF link annotation
- https://static.s123-cdn-static.com/uploads/4405642/normal_5fdd2699a94e6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484633/normal_604cf95c05db3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466676/normal_6033a2e780719.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426955/normal_5febfbd39b444.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367312/normal_601c875048ece.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481069/normal_5ffb4a60407ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452609/normal_5fe9243faf6b8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488817/normal_6009e8c4710c5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381737/normal_6057c4701dce1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384650/normal_600fc20aec89b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448743/normal_5fdf86c57c541.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485689/normal_60570f2f3c9f6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478131/normal_6053a36e2bdc4.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/nijosinizo/gasufolebonerotot.pdfIn PDF document text
- https://s3.amazonaws.com/zunaduxa/tesla_coil_design_construction_and_operation_guide.pdfIn PDF document text
- https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_250749ab46764a9bacf7d62386ebb031.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/selivuvumepaveb/94817760485.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/286980eb-c1e4-4431-b4e8-5ecc3bf3be97/is_1920x1080_the_same_as_1280x720.pdfIn PDF document text
- https://s3.amazonaws.com/wovugi/33672601076.pdfIn PDF document text
- https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_bc74e7b41d5b4b4781680ba6a93596fb.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/93eb7700-f4eb-4584-9ac6-69bd3ef8a347/dororuvimevilekob.pdfIn PDF document text
- https://s3.amazonaws.com/jamuluvuvava/31578371027.pdfIn PDF document text
- https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_1bdd94d8b4444e4e90c4231cd168be2a.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/c5e3d917-2d30-47c6-86b7-b7ac7dc94b66/tokunbo_2009_lexus_rx_350_price_in_nigeria.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_off0000ef5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF5B	5180 bytes
SHA-256: `830d6fbc839d32b12f7668d6d57b6f359edd9d66eb4083ffb73d5317021a9555`
`font_01_sfnt_off0001010c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1010C	23876 bytes
SHA-256: `89fa3abaf0f6225e75614b9662896d0793e1ea38d6d218d39fd566b424db3dd6`
`font_02_sfnt_off00013680.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13680	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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