PDF malware analysis — malicious · ad5a8bf5e39ee295

MALICIOUS

PDF

78.2 KB Created: 2021-05-30 15:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: fba490ffaad1ea1e3163cf298a3393d7 SHA-1: 3e2fcd7873a3731e3c2b38ff1c05f883edec4cd4 SHA-256: ad5a8bf5e39ee295e87c6346de8f732f87fad5107b1c4b1c907028596debb138

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 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.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://dafemum.ru/strik?utm_term=veryfitpro+app+not+working PDF link annotation
- https://tigisara.weebly.com/uploads/1/3/4/6/134651617/rasanajizovejizuwopi.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4462985/normal_60b2b649628c3.pdfIn PDF document text
- https://dukitupa.weebly.com/uploads/1/3/4/3/134393571/jupukovijaligimon.pdfIn PDF document text
- https://rusokakes.weebly.com/uploads/1/3/4/0/134016884/8235134.pdfIn PDF document text
- https://femadupimasimu.weebly.com/uploads/1/3/4/5/134594559/7034704.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470825/normal_60182fca5c909.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/3a80eed6-09c2-4cb6-8457-ed3de920f276/best_private_channels_to_add_to_roku.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9da89740-71a0-4ff4-924b-9d760030e9fa/loletajinetumimulexoxev.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bce3bd6d-1427-48ce-914d-06970905b59d/como_criar_tempo_no_little_alchemy.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5f144b4a-94fb-498d-bb82-5de0f6e9e32c/is_roomba_i7_worth_it.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/acacdf32-57b3-4f0e-bd44-ed6d5ca9e52a/average_pay_of_emergency_medicine_doctor.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e96339ce-86a6-4600-b5c1-71075252bc48/how_to_reset_ozeri_bathroom_scale.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/45d77825-3714-44a4-807a-68bddc86b047/business_communication_course_outcomes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e2df5b21-fa83-4042-b61d-64c401bca2ed/ar-15_scope_with_laser_and_flashlight.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cdefcd06-4ee5-4597-baa1-cd6c7e4ef1ce/33283211022.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dfeb4962-3852-482a-b453-f45ed605e46a/why_were_14_books_removed_from_the_bible_1684.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ed3e18a2-3694-4aad-a205-55e4d4c3b671/49227083069.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb30bb9d-2633-4899-b23e-aa7f5b5a4246/do_you_need_gcses_to_join_the_royal_navy.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54c47947-25bd-4851-a574-38dca3d9677f/mofep.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_off0000e7f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7F1	4872 bytes
SHA-256: `e4f33a3975075804a9fcc8754bdbb61b2015f5ade8a78c5025079b2ae2710234`
`font_01_sfnt_off0000f8a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8A9	10752 bytes
SHA-256: `299fd67a175a3631ad7b3764a81bf6d4703100b656a62944106443c4f9598320`
`font_02_sfnt_off00011d77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D77	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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