PDF malware analysis — malicious · 1b56c76a7f1afdc2

MALICIOUS

PDF

80.8 KB Created: 2021-05-28 06:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: b78d4c8042967e70c5215f1657868015 SHA-1: f666fa3a520bc91794235a52eb16a22a3f53011b SHA-256: 1b56c76a7f1afdc29453abfb2781deaf4c716503f56a02fc193b2d23ce28264e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic indicating a link farm on disposable hosting strongly suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

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://botokaw.ru/123?utm_term=energias+renovables+en+alemania+pdf PDF link annotation
- https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/bb7f1d0ab20edb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451563/normal_60062c1716d0d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424985/normal_5fd1386a7612f.pdfIn PDF document text
- https://magirodimape.weebly.com/uploads/1/3/1/6/131637482/5404431.pdfIn PDF document text
- https://xukoperupe.weebly.com/uploads/1/3/4/7/134743664/2042851.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481286/normal_602feb98b7eef.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366668/normal_5fe2c3abdbb81.pdfIn PDF document text
- https://lufavipipoj.weebly.com/uploads/1/3/4/5/134580953/6720403.pdfIn PDF document text
- https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/jezipevux_jisobigarifomob.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491148/normal_5febf4699c68c.pdfIn PDF document text
- https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/3472e85de.pdfIn PDF document text
- https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/fd55bd7e573.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379369/normal_6047bfbeea657.pdfIn PDF document text
- https://rurasudi.weebly.com/uploads/1/3/4/4/134485231/jefesewanomu-patiwunem-jexevaxerogiw-xakamolu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481055/normal_5fd896295a5d7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4390324/normal_600953a47ece6.pdfIn PDF document text
- https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/viritabogun_tudij.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/1a7dcf06-dc94-4f9a-995d-def66f6663b1/kiderun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db2711b2-808f-4f11-b426-dbab3d55686b/brinkmann_5_burner_gas_grill_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a18fbea7-7ab3-4d3d-ba3e-90b52feb06c7/world_history_book_free_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/227d6802-252c-4c3c-88ee-6eebfacc9f80/49257902995.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4fe43b5b-4b82-4f69-9a82-657d3efc7aef/what_is_self_destructive_behavior.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_off0000ed1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED1E	5228 bytes
SHA-256: `18193a5df246152efe418e73c9164ea9f9bf3dd6d4000ebbb947e14fc4d73ab7`
`font_01_sfnt_off0000fec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEC3	11944 bytes
SHA-256: `02ff07d0a3eacbb8518dff1f84e38d55faca8d348bcd015b49a66bfcfd8eae05`
`font_02_sfnt_off0001257b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1257B	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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