PDF malware analysis — malicious · 9299777f2556e0dc

MALICIOUS

PDF

71.8 KB Created: 2021-05-21 19:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 358291d9bb1f66a93c441a4f2d6a1035 SHA-1: d579bc5599d11f1c5b2be3013be59a22a83646ed SHA-256: 9299777f2556e0dcf6a030f9e20304a12081fec823db3b6284f8038d6e112f2f

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting it's part of a link farm or phishing campaign. The presence of a download button lure and callback phishing indicators further supports a malicious workflow, likely involving the download and execution of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 7

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 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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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
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://dugedepap.ru/strik?utm_term=catholic+cameroon+hymnal+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4418575/normal_60074fc44185a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489032/normal_602ca0648ee39.pdfIn PDF document text
- https://kivubuzer.weebly.com/uploads/1/3/5/3/135332577/fimuj_xujedubikil.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483842/normal_602f4c91838a1.pdfIn PDF document text
- https://puxefulido.weebly.com/uploads/1/3/1/3/131383426/nubakafefisaz-tinirisagu-melilav.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408177/normal_601c947bcfb86.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464525/normal_6035bf7d9c15c.pdfIn PDF document text
- https://lukejofavum.weebly.com/uploads/1/3/4/4/134455809/2066002.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382003/normal_602446057157b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379371/normal_604797cf5cf36.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417814/normal_5fd90eedd4012.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454808/normal_601ffc5806175.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387410/normal_6027e73a9708f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461207/normal_606390f56bece.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464525/normal_601df86e68f10.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/povodijirig/agile_methodology_user_stories_template.pdfIn PDF document text
- https://s3.amazonaws.com/tabobujimo/78627616697.pdfIn PDF document text
- https://s3.amazonaws.com/divikufifir/pioneer_sp-sb23w_popping.pdfIn PDF document text
- https://s3.amazonaws.com/vetamedisoz/dagudorufovewakuxinesoji.pdfIn PDF document text
- https://s3.amazonaws.com/sosupejuxofedo/69001059730.pdfIn PDF document text
- https://s3.amazonaws.com/zedilegol/norovi.pdfIn PDF document text
- https://s3.amazonaws.com/fejenijovekozu/avisynth_32_bit.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_off0000db1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB1C	5224 bytes
SHA-256: `732096ec5579d1c7d64c2fab01ca2742c670ee8663d91820c296e0e9f59aeeea`
`font_01_sfnt_off0000ecbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECBF	11020 bytes
SHA-256: `3cbfa18c19014471597c7da49a4b2bf3cdbc60dcb265d891359a7a9eb352de20`

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