PDF malware analysis — malicious · b63baef1adacbf74

MALICIOUS

PDF

83.8 KB Created: 2021-03-04 18:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 13cc8befae5e43d6a0c3aa6204840f07 SHA-1: 136052ceef4b7108ef3eec61683ef2873a4aed94 SHA-256: b63baef1adacbf74291674e3931da5f090c7fe8c2420024a9fc5cfee07a8a7d9

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://fokemale.ru/award?keyword=motorola+moto+g6+guide PDF link annotation
- http://natiral.space/supply_chain_management_mba_noteswnwev.pdfIn PDF document text
- https://cdn.sqhk.co/rebabafa/LkTusjh/39269057327.pdfIn PDF document text
- http://agentsecure.space/837326814736it7n.pdfIn PDF document text
- https://cdn.sqhk.co/tixaxelubigi/n5jgohw/game_cat_simulator_2020_mod_apk.pdfIn PDF document text
- http://nebo-baikala.ru/dometic_rooftop_rv_air_conditioner_repairnql5m.pdfIn PDF document text
- https://cdn.sqhk.co/vapezuwe/W6mxaDO/nomirab.pdfIn PDF document text
- https://cdn.sqhk.co/jugemito/9gdKgiP/lanolomosigenatezu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369509/normal_6033b122044bd.pdfIn PDF document text
- https://cdn.sqhk.co/pemenodisoda/jigdjcE/minigun_firing_sound_effect.pdfIn PDF document text
- http://pe50off.pro/2838695386jf2zr.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385648/normal_601ce12bb4926.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378405/normal_601a1b95baf9a.pdfIn PDF document text
- http://fullhp.info/element_tv_picture_problemsriioe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/84f5cecc-0ce7-425a-8875-bceeae53e664/bright_starts_playful_pinwheels_bouncer_instructions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f9d41d3-a861-44f0-a7f0-06a8a634f48e/vojukeranilalilat.pdfIn PDF document text
- http://wijabotivov.epizy.com/dakixanegiril.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/09b12564-4312-4248-be12-254ecd170674/medieval_2_total_war_best_mods_2020.pdfIn PDF document text
- http://fepapasofefo.epizy.com/kofodizasirinoroni.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ccdc8cf-ddbe-42b5-9cca-99fb6e4b74a2/latajaxoguxopaxaj.pdfIn PDF document text
- http://murarefap.epizy.com/roriramube.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d2f3094-b33d-47ff-8180-788a76c39bc3/apple_books_app_for_windows_10.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e22dcd9-232d-45ba-83a6-330fbbe1ae26/gaxisavurofawu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/04752be2-f179-49e3-8f01-3c251ad81aac/is_has_a_singular_or_plural_verb.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f44e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF44E	5124 bytes
SHA-256: `874af364a5d9df403e6e9565197746c2b9dc1c993fa7326528ebe02fe93b1fab`
`font_01_sfnt_off000105a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105A9	10104 bytes
SHA-256: `09d4a7f625079ce6ab4d2ca845d2c7d002460086e953b73be35933ce3eab02cc`
`font_02_sfnt_off0001287e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1287E	17028 bytes
SHA-256: `bbefc643780d9a0abcd284c662b555747075330d56a553eb40eb0f5c4ccf8f50`

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