PDF malware analysis — malicious · 0864d4e5aab9c9ab

MALICIOUS

PDF

81.7 KB Created: 2021-06-10 15:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 067701ada76aa55a172e4963f54fe3f0 SHA-1: 6c4c34a5ccc88348778e2390cfc986628a80eba5 SHA-256: 0864d4e5aab9c9ab03a66501ca418c50fbb9cb5fa8a4ac7a36d473fa30a293e3

74 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs and is flagged by ML classifiers as malicious. The heuristic 'SE_INVOICE_LURE' suggests a fake invoice or payment lure, which is consistent with the document body mentioning '49a pan card form pdf download'. The primary malicious URL identified is https://crewmak.ru/pbw, likely serving as a download or redirection point for a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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://crewmak.ru/pbw?utm_term=49a+pan+card+form+pdf+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4469836/normal_6042e1289bd99.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377109/normal_5fe920626bea8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379603/normal_6007d5d6bebb6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387712/normal_6012fafdbb463.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://wozixokumo.pbworks.com/w/file/fetch/144870669/46136213207.pdfIn PDF document text
- http://vulazojab.pbworks.com/w/file/fetch/144546300/reprogram_genie_wireless_remote.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/68f5d294-d440-4a45-b4bb-20a51abf19ed/what_does_nn-1_2_mean.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/05a24e20-1879-4d18-b0f8-f7eed7d7cf39/bademijobobofirixagud.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/71ca7087-e6e1-45a1-b4d2-b35bacfdd2e4/20222658168.pdfIn PDF document text
- http://fetinaduv.pbworks.com/f/nimirisinabiv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/035eece6-f565-427c-9907-fe6a5e840da9/bronica_etrsi_manual_download.pdfIn PDF document text
- http://xalomuzavege.pbworks.com/f/gurofebuvivovu.pdfIn PDF document text
- http://xuruzinijub.pbworks.com/f/dark_souls_best_divine_weapons_reddit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8e111652-a037-4459-a0cd-1aac76dd5294/find_phone_location_free_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb2700f9-5f12-4cb2-a9f6-16ab070bb909/optiplex_390_memory_upgrade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6a2ae87a-a226-4672-b06f-eb35ae64b2ac/piano_keys_chart.pdfIn PDF document text
- http://lakiluxodev.pbworks.com/w/file/fetch/144659346/gta_v_patch_fix_oiv.pdfIn PDF document text
- http://vojewukejiwu.pbworks.com/w/file/fetch/144903543/44571140364.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/18076305-ee38-4847-85f9-8cc5a7e11ddb/linux_crash_course_for_beginners.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/56b2c190-5967-41c8-b7a4-860d3cf649eb/wendys_chicken_nuggets_nutrition_carbs.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_off0000f2f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2F7	4904 bytes
SHA-256: `316bd061992a7b585ed878ad29378b76b87c70219df6c93fef7d2e5c328b9ee3`
`font_01_sfnt_off00010387.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10387	11768 bytes
SHA-256: `4154528bb82c3957e740002313556a15c9ee039129117b86ff46e83a0519f756`
`font_02_sfnt_off00012b4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B4D	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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