PDF malware analysis — malicious · f7790999102db494

MALICIOUS

PDF

83.8 KB Created: 2021-04-02 00:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 1c58ca42481a14b1667d08b7b78c13e2 SHA-1: c3bc71dad3df7de844e814757472277743b4a9e0 SHA-256: f7790999102db494b7b41694c9dce00a9f964fab58301dc395c90ee48839d324

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains text related to 'hiv aids pdf' and 'wkhtmltopdf', likely as a lure to attract victims to click on the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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 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://druttle.ru/award?keyword=definition+of+hiv+aids+pdf PDF link annotation
- https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/zawejevokapebokusi.pdfIn PDF document text
- https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/jivibakivof_zebel_motazudorodexad_sazaxafumat.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366662/normal_5fc7bbef1e867.pdfIn PDF document text
- https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/sutuferovuxaruxe.pdfIn PDF document text
- http://kulinar2020.site/28929258085e5nma.pdfIn PDF document text
- https://cdn.sqhk.co/bepesewutu/dhjEghf/sepofogikesepuputebizop.pdfIn PDF document text
- https://pusurezifokuni.weebly.com/uploads/1/3/4/3/134317864/mifatujojurizon.pdfIn PDF document text
- https://wonozonozosog.weebly.com/uploads/1/3/1/3/131398184/2170063.pdfIn PDF document text
- http://pedron.fun/verb_to_be_exercises_all_things_grammarw7ole.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427103/normal_60504a1dd121c.pdfIn PDF document text
- http://biggymstoe.com/business_english_eslduqb7.pdfIn PDF document text
- https://cdn.sqhk.co/riroxale/jehajbv/student_exploration_digestive_system_gizmos_answers.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461219/normal_5fff99a9beb1a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488804/normal_5fe7a91d9366d.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/padanivozeb/zipusenubajusojavowarufag.pdfIn PDF document text
- http://wevosowenafa.epizy.com/24530237071.pdfIn PDF document text
- http://dudowowadoz.rf.gd/what_is_the_mood_of_the_house_of_usher.pdfIn PDF document text
- https://s3.amazonaws.com/pazovugal/86765347463.pdfIn PDF document text
- http://fimokixavojakuf.epizy.com/52919220885.pdfIn PDF document text
- https://s3.amazonaws.com/juzewojavomofew/tepiwodixex.pdfIn PDF document text
- https://s3.amazonaws.com/pomaxa/wartune_sylph_merge_guide.pdfIn PDF document text
- http://pewuzakij.epizy.com/26519944516.pdfIn PDF document text
- http://begosene.epizy.com/70086633990.pdfIn PDF document text
- https://s3.amazonaws.com/penale/3070929979.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_off0000fe12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE12	4848 bytes
SHA-256: `b07a1a3ea48af1abd08d3c00cc5087ed45301f434c152042b31e12396a4da18f`
`font_01_sfnt_off00010e97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E97	10892 bytes
SHA-256: `270365a2f58885ee17c9e8f5b50a3ab261c2580764659fba8a5a06ac7c195f8b`
`font_02_sfnt_off000133a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133A8	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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