PDF malware analysis — malicious · 81941fb19e61c96a

MALICIOUS

PDF

77.6 KB Created: 2021-05-31 12:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 324693a0c3b577e05862cf3c6d150d4a SHA-1: 69840dc1edb13eedaf13fd3cbdcf9537cde11d2c SHA-256: 81941fb19e61c96af2285d383eb9f42e434de2d132e12783f228a91e9cc61f1c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are structured as a link farm, suggesting a phishing or scam operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=maxi+cosi+car+seat+replacement+strap+pads PDF link annotation
- https://cdn-cms.f-static.net/uploads/4490121/normal_60349891cc52e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464852/normal_5fd9f2c6dc278.pdfIn PDF document text
- https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/7945449.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479226/normal_603e2a1dad227.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427523/normal_600aa503161c2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365660/normal_6039cae32b9b9.pdfIn PDF document text
- https://torewofatovamek.weebly.com/uploads/1/3/4/1/134108613/xonidazodo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383913/normal_604f24ee18838.pdfIn PDF document text
- https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/4897997.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483336/normal_603bdd75ed912.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422659/normal_606a57453d155.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366630/normal_602e7e982dbf9.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://uploads.strikinglycdn.com/files/bb317a16-ac3f-4aee-9d39-b420fd59b85a/jemuse.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bfa51445-311c-4dd5-85b4-5406136cfbf7/nisuzidibi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/25f50d39-1226-43d3-ab94-42e667ce316e/luzunedegaxajolo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3cd6a276-8082-4386-b03f-d174c51b1fd4/how_to_reset_honeywell_th8000.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/16e7feb3-00af-403f-a97b-db9b88616c1e/latest_arewa_gospel_music_2020_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7ecb8933-7698-4701-b9d7-029714ed8391/posawiwowerizudemi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/945b85b0-42ad-44e7-81d3-de46abfd861a/55164071786.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/348c2bbd-9870-483b-9820-7fac78f3c33f/muwivopofa.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_off0000e5d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5D5	5080 bytes
SHA-256: `f8b20186560df40fd29ceb79f604b0059d2a1da9f7ff2dd4aa65804264e8377d`
`font_01_sfnt_off0000f6fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6FD	10344 bytes
SHA-256: `9fa6e47cb04119264341883a4ad6d076861695902f91459965a3101d81dd6748`
`font_02_sfnt_off00011a67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A67	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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