PDF malware analysis — malicious · 21edae648214395c

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 13:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 97a5c17c2bef26d99a2765a045532ee6 SHA-1: 0d83ba9f948239641bdeb824e7200ee4aa4103ab SHA-256: 21edae648214395c14caf1b00986684f2d0bda09e7a6003fed0675eebde59e1b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan behavior. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('resalured.ru') that is likely part of a phishing or malware distribution scheme. The PDF structure also indicates it's a link farm, further supporting malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 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://resalured.ru/strik?utm_term=spanish+dictionary+imperfect PDF link annotation
- http://distornyup.site/18941720074rujbc.pdfIn PDF document text
- http://italywom.space/harbrace_guide_to_writingtnz3o.pdfIn PDF document text
- https://cdn.sqhk.co/zoxunoromi/gfgjy4C/fifudatazovovelu.pdfIn PDF document text
- https://cdn.sqhk.co/fokodusi/gibhdNc/biwanowunuvuviribizebi.pdfIn PDF document text
- https://cdn.sqhk.co/natefisaka/jjc5ijP/17345537664.pdfIn PDF document text
- http://kinokaiff.space/half_yearly_answer_key_2018_biologymukub.pdfIn PDF document text
- https://nezasofesaz.weebly.com/uploads/1/3/5/9/135961661/2b2fca4643a.pdfIn PDF document text
- https://cdn.sqhk.co/vavegewumur/kjcal1e/pokiragixofibarokurijozub.pdfIn PDF document text
- http://distornyup.site/vamujelalogutibewobebariw6p94.pdfIn PDF document text
- http://govorudoxamelap.22web.org/83035801402.pdfIn PDF document text
- https://dirarogevuku.weebly.com/uploads/1/3/5/3/135351224/a08879a.pdfIn PDF document text
- https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/2046f5f1db.pdfIn PDF document text
- https://buriviniroxino.weebly.com/uploads/1/3/1/6/131606563/piwiz_vefopemuna_pugegemisepulof.pdfIn PDF document text
- https://cdn.sqhk.co/fukafodifi/jftQhiF/mere_bhole_baba_song_djpunjab.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://jemavavobeziv.epizy.com/xofafupiribiw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c853cdce-e275-413f-906e-47652f26299a/69396821798.pdfIn PDF document text
- https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_c7ccbb563e9d4e98ad8e857424f11a28.pdf?index=trueIn PDF document text
- https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_b06304946b5d4ef9abefd817cb3fcac0.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/4bccded3-257b-4658-adae-b4cb472dd587/macroscale_and_microscale_organic_experiments_7e.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/823bbdff-cc89-4964-9945-07a9f6800010/86766077516.pdfIn PDF document text
- http://bumojomoso.rf.gd/pezulovor.pdfIn PDF document text
- http://kutifakibidi.rf.gd/pamiduku.pdfIn PDF document text
- https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_3bdd3666de294b3d946270612a26fdab.pdf?index=trueIn PDF document text
- http://torunej.epizy.com/28819091525.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2a563fb4-4854-4b9e-adc4-c65d9b869fba/how_to_use_lowrance_elite_4_chirp.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_off0000eb28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB28	5568 bytes
SHA-256: `21f16cafea00922b4c83ed88d38bfb6ea5e64ca0491f7d9b93934bd27c728a8e`
`font_01_sfnt_off0000fdf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDF7	11560 bytes
SHA-256: `7118f58cae15ea7fa838c69aa7ca883b0ddd05c182a71a8409000ca3c0064bc3`

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