PDF malware analysis — malicious · 40c6959c0221b6cc

MALICIOUS

PDF

79.7 KB Created: 2021-04-28 18:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 58b14c87b3a538defa292ac58ac740fa SHA-1: ffbeb986ebe880a10b2bcd8df9f58d3a521b9d54 SHA-256: 40c6959c0221b6cc6d73b798dcf9e0145fbc192e4f7173a64b29a278d8462f53

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

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.
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://xezojetit.ru/strik?utm_term=can+you+put+carry+on+underseat PDF link annotation
- http://zamowafa.mywebcommunity.org/27104560573.pdfIn PDF document text
- https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/nutevutojut.pdfIn PDF document text
- https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/nomuwiruvuragitekop.pdfIn PDF document text
- https://cdn.sqhk.co/rowalulo/djihwid/download_game_hello_neighbor_hide_and_seek_apk.pdfIn PDF document text
- https://cdn.sqhk.co/satukevaguka/brPjJjf/go_karts_near_me_indoor.pdfIn PDF document text
- http://kakolamilasaru.medianewsonline.com/strength_workout_program.pdfIn PDF document text
- https://cdn.sqhk.co/noperizapewo/hSYheig/pv49_freebies_meaning_in_tamil.pdfIn PDF document text
- https://cdn.sqhk.co/kejaxedusuk/hj8jbJe/40240741135.pdfIn PDF document text
- http://tifoxikutawe.sportsontheweb.net/dawavo.pdfIn PDF document text
- https://cdn.sqhk.co/gujowaxexag/zUFjeRt/47516188451.pdfIn PDF document text
- http://mapotilij.mygamesonline.org/delta_bandsaw_bs100_parts.pdfIn PDF document text
- http://jukojadijomefar.medianewsonline.com/98183831017.pdfIn PDF document text
- http://wulutano.mywebcommunity.org/an_introduction_to_language_and_linguistics_textbook.pdfIn PDF document text
- https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/dupozave.pdfIn PDF document text
- http://kitixukizogutik.mygamesonline.org/2011_toyota_rav4_known_issues.pdfIn PDF document text
- http://mujudesuxiropa.sportsontheweb.net/jibururedepo.pdfIn PDF document text
- http://mitatizizuje.mypressonline.com/32102229197.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://pefimubis.myartsonline.com/medicalizao_em_psiquiatria.pdfIn PDF document text
- http://wusozupit.myartsonline.com/medical_certificate_format_for_sick_leave_for_employees.pdfIn PDF document text
- http://donijexufenu.onlinewebshop.net/the_logical_thinking_process_download.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_off0000ed4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED4F	4992 bytes
SHA-256: `6c2d1b838e2da8a39606d71110d52a46045484b1c6e2f6937dec663f1f4eedae`
`font_01_sfnt_off0000fe5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE5A	11128 bytes
SHA-256: `e8b57dfa9ea0f8bb858b886154768667dcabb0278a4bdd9b27b72451fa76f799`
`font_02_sfnt_off00012347.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12347	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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