PDF malware analysis — malicious · 1f919c12cf3a4c73

MALICIOUS

PDF

81.4 KB Created: 2021-06-10 14:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 72651cf6c880836a5cace977f2cbbd60 SHA-1: 90807faaf5fdd436712fad96a25ec9230165d0bd SHA-256: 1f919c12cf3a4c7320f3c8d2b2a940a34c533063f598020b96dcd4f0b951670e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a phishing lure, specifically mentioning invoice or payment language. It embeds multiple external URIs, with a primary suspicious URL being https://nomylo.ru/pbw. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

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 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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://nomylo.ru/pbw?utm_term=accounting+ratio+formula+pdf PDF link annotation
- https://static.s123-cdn-static-d.com/uploads/4449984/normal_60b0a4e6958ee.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422367/normal_5fe21bbc7ddaa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4457590/normal_60040f0c448ad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365634/normal_6017bf8e38c74.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404955/normal_6046b961e0cd8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381085/normal_6050ebae6c430.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481062/normal_5fd1a97332489.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368504/normal_5fe6bb614935b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465249/normal_5fe20d4a784e9.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/a151c6ae-6113-4b62-a0e9-817d93c34e61/oc_warrior_cat_names.pdfIn PDF document text
- http://sazupamufode.pbworks.com/f/nemodenixu.pdfIn PDF document text
- http://zikupuzajix.pbworks.com/w/file/fetch/144434514/jikenoviromo.pdfIn PDF document text
- http://pewudomame.pbworks.com/w/file/fetch/145030419/30683539893.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eb815fd7-1e81-4f46-933d-cf8b281d56c3/msi_n1996_manual_download.pdfIn PDF document text
- http://guwodav.pbworks.com/f/bovikojiduvapuwitejapo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01f11c54-cf90-44fe-92e7-582057edfe5d/fisher_price_jumperoo_minimum_age.pdfIn PDF document text
- http://pevozowo.pbworks.com/f/35460256916.pdfIn PDF document text
- http://zikupuzajix.pbworks.com/f/39106679043.pdfIn PDF document text
- http://sukagafamo.pbworks.com/f/tonepepanofod.pdfIn PDF document text
- http://mogulazedub.pbworks.com/f/27399197733.pdfIn PDF document text
- http://fokurid.pbworks.com/w/file/fetch/144766509/lokafuzosoxi.pdfIn PDF document text
- http://natizasex.pbworks.com/f/10685319904.pdfIn PDF document text
- http://lowigamivux.pbworks.com/f/93928314674.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_off0000f205.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF205	5048 bytes
SHA-256: `176bb469c025e6f4faa8b071b0504442237b1b273cb9398b8602915d8ecee5d1`
`font_01_sfnt_off0001030b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1030B	11476 bytes
SHA-256: `0942ff24f8c64d754921e52204b79f179c29c16127365ec8d6eaaafb961bb948`
`font_02_sfnt_off00012a17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A17	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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