PDF malware analysis — malicious · 2d9d65074f3ec09f

MALICIOUS

PDF

76.9 KB Created: 2021-03-21 00:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: ee2b08f634a2136988ddade570b8a76a SHA-1: c1dfcfe72e3100c142cbfa88ac9ce5340844a53e SHA-256: 2d9d65074f3ec09fe07e4d264394b0777ad95e39ae6123423bdff0ab6e7436b1

192 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including a critical finding for malicious redirector links and a machine learning model indicating high maliciousness. The document contains a large number of embedded URLs pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of a 'Download' button lure further supports a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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://dafemum.ru/strik?utm_term=verb+preposition+combinations+exercises+pdf In PDF document text
- http://jopimutedu.iblogger.org/zizixubigesutam.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484806/normal_5fcbd13feec41.pdfIn PDF document text
- http://creditscorecard.info/zizanalalape28zu5.pdfIn PDF document text
- http://fastgetme.online/fubizoh42rj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375194/normal_5fd2d06b6e0f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484122/normal_602543c72b64c.pdfIn PDF document text
- http://farunoraxukiz.getenjoyment.net/active_directory_troubleshooting_interview_questions_and_answers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380395/normal_5fd12b0ccf4e7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370078/normal_5fee890ed6ad3.pdfIn PDF document text
- http://about-fb-support.com/photoshop_cs6_tutorials_for_beginnera5rc7.pdfIn PDF document text
- http://fetedeju.mygamesonline.org/41822890538.pdfIn PDF document text
- http://kkkirrreeee.space/ralujuwadimifugumbz0q.pdfIn PDF document text
- http://arenaprobet.com/3175781766x3ld.pdfIn PDF document text
- http://trixy-matrix.space/how_long_is_dialectical_behavior_therapyrd0x6.pdfIn PDF document text
- http://lollipopa.online/what_does_dapple_grey_mare_patronus_meannhv1v.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422631/normal_6036492f2bd36.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473035/normal_604f3de922356.pdfIn PDF document text
- http://dajobod.getenjoyment.net/tippmann_a5_stock.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388046/normal_603b75901b873.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368250/normal_5fcebd5f189f9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://pusebirenox.myartsonline.com/58952475238.pdfIn PDF document text
- http://xowegitonazip.epizy.com/24388388905.pdfIn PDF document text
- http://gefuwaw.atwebpages.com/28078608686.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f009.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF009	5444 bytes
SHA-256: `548a754ad7a7404ff71978617d864fac0452657046e6f6ea294ff880fc1f141c`
`font_01_sfnt_off00010279.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10279	10376 bytes
SHA-256: `3c1c796e15608bcf6e5fdfde84faef47818d45caf4400e915b1fc6e6b89ab599`

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