PDF malware analysis — malicious · be9cbd04a16a1257

MALICIOUS

PDF

84.1 KB Created: 2021-03-21 10:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 6a2f92005dd145887d52588d4a17ea0e SHA-1: 9156a480e9b96661416dd09efb41feabb93a3476 SHA-256: be9cbd04a16a125768c4e4b0af10c3613d3034c9604414edbf7e14702755f9ce

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate the document's purpose is to redirect users to a network of other sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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 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://jacksth.ru/123?utm_term=class+of+heroes+2g+guide PDF link annotation
- https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/leraw_xezikusafu_mepasoru.pdfIn PDF document text
- https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/bfdeff86d1a5.pdfIn PDF document text
- https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/zisenijiguli-lajebubov.pdfIn PDF document text
- https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/0c4bd5af9.pdfIn PDF document text
- https://cdn.sqhk.co/wukegotubujo/HBBKifQ/idp_education_limited_annual_report_2017.pdfIn PDF document text
- https://cdn.sqhk.co/balapakufogo/egfBheC/harris_academy_jobs_login.pdfIn PDF document text
- https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/wepozikutugezub.pdfIn PDF document text
- http://vemasujananexu.22web.org/nixoteni.pdfIn PDF document text
- https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/sunemez.pdfIn PDF document text
- https://cdn.sqhk.co/mowamukar/fgfKzji/togisaninufetikow.pdfIn PDF document text
- https://cdn.sqhk.co/lagidexetin/7ol5ge4/pamepokedaputijasakapikaj.pdfIn PDF document text
- https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/9853892.pdfIn PDF document text
- https://cdn.sqhk.co/bikugipozamu/CQlvihP/vatudopotewawuvumujisumox.pdfIn PDF document text
- https://geruzusuvar.weebly.com/uploads/1/3/0/7/130776720/efb1db.pdfIn PDF document text
- http://lawobulobatidu.22web.org/nubidafevaxoruvusekol.pdfIn PDF document text
- https://cdn.sqhk.co/tezizejaropu/gdoihdh/dapelegigiledosigemegone.pdfIn PDF document text
- https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/fugikaxizewoje.pdfIn PDF document text
- https://povazolanatul.weebly.com/uploads/1/3/0/7/130740072/volovunu-xukibimeli-xevozoris-wofevepatirexa.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://gumupomomoripu.rf.gd/olaudah_equiano_recalls_the_middle_passage.pdfIn PDF document text
- http://sevezogare.rf.gd/after_effects_the_power_of_expression_free_download.pdfIn PDF document text
- http://xujalupa.epizy.com/kirchhoff_s_laws_questions_and_answers.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_off0000f080.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF080	7992 bytes
SHA-256: `a7ff65a00c4a5328a66e1b35efc9ecfc2dadaaf3069645fc039e285e50e06760`
`font_01_sfnt_off00010b7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B7F	5208 bytes
SHA-256: `e4b9c8605ae2bee021aee63f66f2b3b7e1574a6f337536f439a76d1228ef38b0`
`font_02_sfnt_off00011d2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D2B	11148 bytes
SHA-256: `ffae97eed99f9f9193ff85b744c3c39e55639a5bbc502e5cbb36854cd4ac0e25`

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