PDF malware analysis — malicious · 9cb7bedb42feda3e

MALICIOUS

PDF

80.0 KB Created: 2021-04-01 01:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28

MD5: 005eab2840587b16280189dd0a9346ca SHA-1: 8d0582d24e1921c133fef961a23124593c6b61c0 SHA-256: 9cb7bedb42feda3e7ffe203849a969a922706c0fb9b1308a519a8dce1b4387ee

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a significant number pointing to disposable hosting, indicating a link farm or SEO abuse. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malicious redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 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.
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://mezovuduw.ru/wix?keyword=pathfinder+mythic+item+creation PDF link annotation
- http://kijokugexi.iblogger.org/federal_holiday_calendar_2021.pdfIn PDF document text
- https://pufotesur.weebly.com/uploads/1/3/1/3/131378771/554b3094a4a0a1.pdfIn PDF document text
- https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/e1fb2.pdfIn PDF document text
- http://savozotob.iblogger.org/manual_brastemp_ative_9kg.pdfIn PDF document text
- http://difavusimope.iblogger.org/chandrayaan_2_in_telugu.pdfIn PDF document text
- https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/warosebabu-wovibem.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
- http://zexitan.rf.gd/bhojpuri_song_2019_dj_tinyjuke.pdfIn PDF document text
- https://s3.amazonaws.com/ronenitevodo/c_reference_return_type.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ce4388bc-323c-40ef-b703-faeda425a4c1/how_to_get_voicemail_off_panasonic_phone.pdfIn PDF document text
- https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_0e26e278e9284305b2ea72fbd2ee04a3.pdf?index=trueIn PDF document text
- https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_a9544e84476149b293d712c897845e8f.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/29833067-4c82-4f64-a2f9-82be6a76d1b4/rurorunava.pdfIn PDF document text
- https://s3.amazonaws.com/mefovu/btc_full_form_course.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e3f2996-f86e-4700-b4aa-b7527fbffe0d/casio_g-shock_mudman_3031_g-9000.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/76bfdd49-6827-455b-bf5c-f6bf69fa3241/vepupesoburaxebenido.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/058c29d8-8b64-49db-b56d-d30e29269a85/650657134.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2b2f1010-27bf-4033-b6dd-5fc3f3f61a8d/8996906828.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f545f7da-229f-487e-9407-9f8cd6f101d2/dizimuz.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_off0000f122.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF122	4944 bytes
SHA-256: `87fe0f533e873252e2a63af0dc0a40926f5b231a88fbb86c10f924ea32747a7e`
`font_01_sfnt_off000101b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101B7	10276 bytes
SHA-256: `6d70c8ab09ccde059edd4d4993b654f4be9b5351b83fd340dd92064c7889e77f`
`font_02_sfnt_off000124e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124E9	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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