PDF malware analysis — malicious · bbf491cb152cf273

MALICIOUS

PDF

81.8 KB Created: 2021-05-11 06:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: f851bed724f1adc7f019b2cdc6a89e85 SHA-1: 650a6b32bde28015184a683efefee59c84690c06 SHA-256: bbf491cb152cf27374e632d723c70345439743af92e2c2374d247cc428874c77

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', with one prominent URL pointing to 'https://xajibur.ru/strik?utm_term=ps4+sports+video+games+2020'. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The presence of numerous external links suggests an attempt to redirect users to potentially malicious content or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

Heuristics 5

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.
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/strik?utm_term=ps4+sports+video+games+2020 PDF link annotation
- http://kizudoluwewomam.iblogger.org/hp_deskjet_2542_wifi_password.pdfIn PDF document text
- http://mujododaziwato.scienceontheweb.net/lafivapan.pdfIn PDF document text
- http://tudilevu.22web.org/ableton_live_shortcuts.pdfIn PDF document text
- http://vibubag.22web.org/lurodemuguwekim.pdfIn PDF document text
- http://sosogemizibu.mypressonline.com/kajusuduzumuzumozanodeben.pdfIn PDF document text
- http://xekalabaxuv.medianewsonline.com/nuxokenosirasajadowe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/timeziso/baby_chinchilla_care_sheet.pdfIn PDF document text
- https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_10558f516b324e46a0a1a807435af080.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kujesulad/bibbulmun_track_map.pdfIn PDF document text
- https://s3.amazonaws.com/loranoduzuja/total_war_attila_franks_unit_guide.pdfIn PDF document text
- https://s3.amazonaws.com/xilasisefi/97982926596.pdfIn PDF document text
- https://s3.amazonaws.com/bezutu/suxusaxevumafogujasipa.pdfIn PDF document text
- https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_e89d9401f431489f89281c33bd839adc.pdf?index=trueIn PDF document text
- https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_eb12a88833ee4ce3af3f2c7a3f9eaa07.pdf?index=trueIn PDF document text
- https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_9bd14c190f674781a00c37155323ec02.pdf?index=trueIn PDF document text
- https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_25de4b69cd524b9ebfebbe226da7fe07.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nafamaragisek/carleton_university_campus_map.pdfIn PDF document text
- https://s3.amazonaws.com/vuxagixil/vande_mataram_pulwama_song_pagalworld.pdfIn PDF document text
- http://wulibazosuxib.onlinewebshop.net/descriptive_and_diagnostic_research_design.pdfIn PDF document text
- https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_26badbd026a94416bfd74a0046228f98.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gurupixabogivaz/22032523322.pdfIn PDF document text
- https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_408b74142981428d9725fde1bd68488e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tamovagag/exhaust_pipe_installation_near_me.pdfIn PDF document text
- http://nivuzujele.epizy.com/16944370452.pdfIn PDF document text
- http://tikisomoxo.epizy.com/what_does_whipped_mean_sexually.pdfIn PDF document text
- https://s3.amazonaws.com/mexijegedakol/bu_jhansi_date_sheet_2019.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000101fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101FC	5668 bytes
SHA-256: `09b8971b414a2b288fd3b46aa876e9605a06a1f14e37806fa83c7b85200fd8f6`
`font_01_sfnt_off00011545.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11545	10608 bytes
SHA-256: `e780d786f217ebdc4639abb7600e7bad807fb4e014a8806496afed1ee0e86614`

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