PDF malware analysis — malicious · 959aef853bd41558

MALICIOUS

PDF

78.7 KB Created: 2021-06-06 06:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 0e12609e86bc768971d86ebf90bd40bd SHA-1: c814604a3aeb626ad43e70b249f64c76dd67517f SHA-256: 959aef853bd41558755580ebea79d5ed88aa7cc754f01c87e6e752a30125ccf3

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs, with one prominent URL pointing to a suspicious domain that is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a lure to a phishing site or a download host.

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://allytemp.ru/pbw?utm_term=flammable+liquid+storage+cabinet+osha PDF link annotation
- https://cdn-cms.f-static.net/uploads/4421612/normal_600ff383ad675.pdfIn PDF document text
- https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/favawebusutelawuxuwu.pdfIn PDF document text
- https://wibizoginoj.weebly.com/uploads/1/3/2/6/132681485/tixemogominig_sujuvutawedarup.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4385216/normal_60b003c8e1606.pdfIn PDF document text
- https://vazasajiverer.weebly.com/uploads/1/3/4/6/134609599/6639289.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382405/normal_605f44d9a706b.pdfIn PDF document text
- https://vataretek.weebly.com/uploads/1/3/4/4/134463024/7699836.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://redelaw.pbworks.com/f/how_to_unlock_all_characters_run_3.pdfIn PDF document text
- http://zevatirupura.pbworks.com/f/12366628564.pdfIn PDF document text
- http://keborekudud.pbworks.com/f/70625837963.pdfIn PDF document text
- http://rabopadob.pbworks.com/w/file/fetch/144585081/62924095320.pdfIn PDF document text
- http://pokuwatosat.pbworks.com/w/file/fetch/144433263/21482952525.pdfIn PDF document text
- http://kibumezi.pbworks.com/w/file/fetch/144436890/benefits_of_dynamic_tension.pdfIn PDF document text
- http://zeladejan.pbworks.com/f/what_is_inductive_teaching_method.pdfIn PDF document text
- http://gosirata.pbworks.com/w/file/fetch/144456120/fagitamenuzaridariw.pdfIn PDF document text
- http://gosirata.pbworks.com/w/file/fetch/144626301/how_to_know_if_a_sagittarius_man_misses_you.pdfIn PDF document text
- http://pidexuxok.pbworks.com/f/does_kindle_run_on_android.pdfIn PDF document text
- http://gupiguna.pbworks.com/f/53945494176.pdfIn PDF document text
- http://sepaxebi.pbworks.com/w/file/fetch/144414003/illustrator_2020_system_requirements.pdfIn PDF document text
- http://xuresasadox.pbworks.com/w/file/fetch/144667947/badrinath_tamil_dubbed_movie_download_tamilrockers.pdfIn PDF document text
- http://xifatarege.pbworks.com/w/file/fetch/144689439/xonapuzigaporuzowatebuvu.pdfIn PDF document text
- http://lojefizowoj.pbworks.com/f/44704174733.pdfIn PDF document text
- http://negaboxa.pbworks.com/w/file/fetch/144475620/rixamelegakazozuviter.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_off0000e5d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5D0	5456 bytes
SHA-256: `7315a3c62c70fe14a3822c9239fc08b2d35db0595c0e7e1f3c21c396a4364969`
`font_01_sfnt_off0000f81d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF81D	11184 bytes
SHA-256: `ee412de8ca69a2aaedac7fb2fa7ba114230fa985f42a2cbe2e3d6fa86ec03cba`
`font_02_sfnt_off00011d41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D41	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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