PDF malware analysis — malicious · f87206ab63623546

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 19:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 3d8706c5c6fe84367d4a65334288c913 SHA-1: c851dd5c6d71b79b5311b0de6df65a536309c61c SHA-256: f87206ab63623546f6dac6cccaccff3b860800553da39adda72785446cb4bec7

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download' button lure further supports a phishing or malware distribution scenario.

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://xajibur.ru/123?utm_term=durango+wildlands+clan+guide PDF link annotation
- http://ttop-shop.com/powopanasurusuvonazppabg.pdfIn PDF document text
- http://leafester.online/how_to_identify_dipole_dipolekaybm.pdfIn PDF document text
- http://wide-take.top/lord_of_the_flies_chapter_10_discussion_questions6b7vi.pdfIn PDF document text
- http://sis-paypal.com/travel_trailer_furnace_not_workingfnou2.pdfIn PDF document text
- http://sale-siberian-force.online/english_grammar_lessons_sinhala_videoqq975.pdfIn PDF document text
- https://fudewuwadume.weebly.com/uploads/1/3/0/7/130740250/dozebuzetuv_doxepajavizim.pdfIn PDF document text
- https://zonulezewuras.weebly.com/uploads/1/3/4/8/134890742/gubizuzepe.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://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_2cd3522d2fbe4aa59108060193f2141a.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/993fe371-b283-473d-94f2-651cd6bdb7fe/ponto_de_encontro_2nd_edition_student_activities_manual.pdfIn PDF document text
- https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_ca57b582803e402b965a4925728de400.pdf?index=trueIn PDF document text
- https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_6a06dbbe1eee42348c9151bd5ca7bb7b.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/fc475cff-1690-4e3a-a032-96f4ea9f8407/the_man_in_the_high_castle_book_vs_show.pdfIn PDF document text
- https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_274b0d09cd1c40e98ac5a2048348a8f6.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/8f87768e-6b54-4077-b5a0-1c51ecb86e34/jajofokatopogo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b65ae767-56ea-4da2-8c8a-ff02d4273a83/legally_blonde_jr_soundtrack_instrumental.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_off0000e0b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0B6	5000 bytes
SHA-256: `6473a8cd2e1fb9ef9cc49247eb2b6601ec8d7cead776a7e70ebef88a464f0139`
`font_01_sfnt_off0000f1c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1C7	10952 bytes
SHA-256: `e9da7bd2f4bffe086279a105e0024f4d7046e73d6eb9dda51f9464ded83dacdf`
`font_02_sfnt_off00011749.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11749	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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