PDF malware analysis — malicious · 6da7b10f19e7093b

MALICIOUS

PDF

48.7 KB Created: 2020-10-15 09:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 7934a258aa38578358086f876a3d0254 SHA-1: bfa39901aa70d465664e34bc5fa42c0daf8032ab SHA-256: 6da7b10f19e7093bd8baf715cb0f56c889840bf83c7b6405a5e8a4da2043f4b9

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'king followers apk app download' and a URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://ggtraff.ru/123?keyword=king+followers+apk+app+download In PDF document text
- https://site-1038653.mozfiles.com/files/1038653/senudujasasenomareteveti.pdfIn PDF document text
- https://site-1040987.mozfiles.com/files/1040987/rinopiti.pdfIn PDF document text
- https://site-1042181.mozfiles.com/files/1042181/xerun.pdfIn PDF document text
- https://site-1043256.mozfiles.com/files/1043256/80360974693.pdfIn PDF document text
- https://site-1038938.mozfiles.com/files/1038938/85664274891.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365575/normal_5f86ff78ba420.pdfIn PDF document text
- https://site-1039515.mozfiles.com/files/1039515/51649757590.pdfIn PDF document text
- https://site-1042009.mozfiles.com/files/1042009/redujowi.pdfIn PDF document text
- https://site-1048482.mozfiles.com/files/1048482/gipifaxarevegalagi.pdfIn PDF document text
- https://site-1037003.mozfiles.com/files/1037003/84978934970.pdfIn PDF document text
- https://site-1038836.mozfiles.com/files/1038836/levavelofowalitufaw.pdfIn PDF document text
- https://site-1036646.mozfiles.com/files/1036646/podafasanaj.pdfIn PDF document text
- https://site-1048222.mozfiles.com/files/1048222/99866250885.pdfIn PDF document text
- https://site-1042347.mozfiles.com/files/1042347/modal_verbs_advanced_test.pdfIn PDF document text
- https://site-1039806.mozfiles.com/files/1039806/9987279181.pdfIn PDF document text
- https://site-1039002.mozfiles.com/files/1039002/denujusote.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366031/normal_5f873f3c56c31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368735/normal_5f87cf76beac4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368958/normal_5f87c748b276a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366340/normal_5f8726f897a99.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365576/normal_5f87326062379.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365639/normal_5f877adbc5992.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366384/normal_5f87e12991f2c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365620/normal_5f872e4751665.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366034/normal_5f874a9d0db80.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://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_off00007157.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7157	5040 bytes
SHA-256: `4bdd0c0a8522466c4ed8a3e2eee92924acce14c3c5bdf4fc45ddac45e562982b`
`font_01_sfnt_off00008294.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8294	10512 bytes
SHA-256: `0688c35907b22471365b073f730ab71619cbff25648a2c3c224f5ffc87b79592`
`font_02_sfnt_off0000a68d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA68D	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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