PDF malware analysis — malicious · 74e24e37a2469200

MALICIOUS

PDF

74.3 KB Created: 2021-06-02 22:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: f21cfaf79d972361914ea525b961f6b7 SHA-1: 911bdbcb6043f5101f5dbae2f7ef153fd1c071a4 SHA-256: 74e24e37a24692005376b0660c67ae694a3267b8fa2f8f26e694528e920d1598

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://drafthe.ru/pbw?utm_term=gujarati+bhajan+lyrics+pdf+download PDF link annotation
- https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/6108995.pdfIn PDF document text
- https://gajabalavira.weebly.com/uploads/1/3/5/3/135347595/suwumojotad-kopus-junubenonun-zezaxu.pdfIn PDF document text
- https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/minuramivukibijuv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376852/normal_60258db768b04.pdfIn PDF document text
- https://dalagusixofu.weebly.com/uploads/1/3/4/8/134853238/mifozenonenumelo.pdfIn PDF document text
- https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/tafakimibebalur.pdfIn PDF document text
- https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/5445880.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365589/normal_5fe44fc600a13.pdfIn PDF document text
- https://bapizemu.weebly.com/uploads/1/3/1/1/131163962/nugedazosapawu.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/f13d55b9-bc2e-49ce-adc6-087ee1193e4c/32757270117.pdfIn PDF document text
- http://xojifot.pbworks.com/w/file/fetch/144425820/81247938612.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/486dfa0c-5d0e-460a-afad-4c420dd29418/98629495955.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/363d6970-8021-48db-86a0-7083ea02e57c/tcp_ip_protocol_stack_implementation.pdfIn PDF document text
- http://felefejimax.pbworks.com/f/73101004526.pdfIn PDF document text
- http://rupebaxo.pbworks.com/f/bengali_movie_free_download_site_name.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/187d169b-ca28-4184-8719-d3ec70a85b21/bumojenamozex.pdfIn PDF document text
- http://noxiwako.pbworks.com/f/papas_sushiria_unblocked_66.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_off0000d6a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6A0	5448 bytes
SHA-256: `52908384877e7856378a860459d0a94cd3bfdede04f5ca9c4bb34bff8f8d5867`
`font_01_sfnt_off0000e930.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE930	11072 bytes
SHA-256: `60f144b3cd04227fc4f60676b6561701b2d1dc8a64250413aa3a8d230a4d0435`
`font_02_sfnt_off00010e06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E06	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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