PDF malware analysis — malicious · 27bf9d4db4b693ff

MALICIOUS

PDF

77.1 KB Created: 2021-04-23 16:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 86659e5ebcabc48b9e1786241b95c83f SHA-1: 7347e6c26d9f2367bade525c61329198b5608c4c SHA-256: 27bf9d4db4b693ff1731728de5e1c5eb083a9da75783cf2c5ce9d8ec0cb7a708

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a link farm and potentially malicious, with a high ML score and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to 'turning off a hot tub', combined with urgency language. The embedded URI points to a suspicious domain, likely serving as a redirector or landing page for a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://kuzutuzo.ru/strik?utm_term=how+to+turn+off+sundance+hot+tub PDF link annotation
- http://sojarenenu.iblogger.org/25167313251.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415304/normal_603c7c1e0f42b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445879/normal_5fcff2863a00d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368750/normal_5fe1067b86ddc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490534/normal_600d8d4b9f28b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386094/normal_606ad5f9b06c2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455174/normal_603323d98c7ec.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://pazutoxun.epizy.com/tidegerobutenawojotitored.pdfIn PDF document text
- http://sikamavidasatam.epizy.com/holographic_universe_book.pdfIn PDF document text
- http://navuwarulugo.epizy.com/the_bluest_eye_novel_for_sale.pdfIn PDF document text
- http://sofopemesojume.epizy.com/kapakuvakagalaneg.pdfIn PDF document text
- http://mevezexagugon.rf.gd/difedezonezibudewekafe.pdfIn PDF document text
- http://gerosopidazab.rf.gd/dazikikuzepepur.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a98eddec-8871-473b-957b-cca978e9a2b2/37138920716.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b1c3033-3edb-4a3d-9aa6-0307187459f9/how_much_is_the_bacon_king_meal_at_burger_king.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ff4241a3-a80e-49dd-96ba-8f595e9d731b/what_movie_genres_are_there.pdfIn PDF document text
- http://badiwiv.epizy.com/repimej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7e79d463-7d58-4e68-938a-9109fc9c6155/16755492709.pdfIn PDF document text
- https://s3.amazonaws.com/nilafafakem/padi_junior_open_water_diver_course.pdfIn PDF document text
- https://s3.amazonaws.com/nopomewegobij/bluetooth_android_app.pdfIn PDF document text
- https://s3.amazonaws.com/vovopafubipu/34106342392.pdfIn PDF document text
- https://s3.amazonaws.com/jebokizez/44286748828.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1d38ee64-7fa4-4f13-a24c-4c993c0150cc/19852191292.pdfIn PDF document text
- http://seriwod.epizy.com/cuddle_buddy_application_form.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_off0000f047.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF047	5268 bytes
SHA-256: `d9fe89557d406ac7683f3d96c0dbb56a816e6e2a0e7eabf1ab98a96bdbdc602b`
`font_01_sfnt_off0001023b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1023B	10652 bytes
SHA-256: `dcf4224ac0d9bfc7ba723d6acce07ea6ae1ae11859ddff8766386ae63617cc21`

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