PDF malware analysis — malicious · b17ed500a0ce47f7

MALICIOUS

PDF

74.7 KB Created: 2021-03-30 21:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ac64c61b5128d3fa04d14969e81b3a3b SHA-1: 7e3d1643f5fece877ff510d3e2207f2915e95924 SHA-256: b17ed500a0ce47f76556a92fe10f616ad52b0500afde690e0bcd1af228b8e005

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=palabras+agudas+llanas+y+esdr%25C3%25BAjulas+4+primaria PDF link annotation
- http://kupimaxi.sportsontheweb.net/asmaul_husna_dan_artinya.pdfIn PDF document text
- http://gexopidikimo.mygamesonline.org/how_to_replace_a_honeywell_alarm_battery.pdfIn PDF document text
- http://nujijaj.getenjoyment.net/kavavusopevo.pdfIn PDF document text
- http://wuzoxisazatik.22web.org/xuzibawakume.pdfIn PDF document text
- http://poxumanavofeboz.scienceontheweb.net/air_crash_investigation_reports.pdfIn PDF document text
- http://lazirog.mywebcommunity.org/kinetico_premier_water_softener_price_uk.pdfIn PDF document text
- http://bopolubolef.mywebcommunity.org/mebipawusesu.pdfIn PDF document text
- http://dakajak.medianewsonline.com/kenabewugufu.pdfIn PDF document text
- http://mamivadusijuf.iblogger.org/what_are_the_main_points_of_the_us_constitution.pdfIn PDF document text
- http://bulubuzigajuzar.getenjoyment.net/85309994270.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://jasesazolaf.myartsonline.com/weight_training_for_beginners.pdfIn PDF document text
- http://gagolabirej.atwebpages.com/catalogo_avon_7_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bed8925b-418b-4886-a695-1279bab43835/60161009368.pdfIn PDF document text
- https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_3d1feffe1d9044f2a3aeabec6e11f1d3.pdf?index=trueIn PDF document text
- http://nabafutig.myartsonline.com/how_to_calculate_speed_of_alpha_particle.pdfIn PDF document text
- https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_c7c0b00954a240ceb9a3080672f3327a.pdf?index=trueIn PDF document text
- http://tumofif.rf.gd/scientific_poster_template_a0_landscape.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a522e261-cfc9-4809-a59f-5a823dcf6c7e/prince_lionheart_wipes_warmer_without_pillow.pdfIn PDF document text
- http://tavamikilav.myartsonline.com/forezagekonimesofadedigo.pdfIn PDF document text
- https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_0b89b756708a47f0973668fbe414462e.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/169e3638-1460-4cd2-8e92-1cdf9ddf7285/zopowibekotetozululiziz.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_off0000d55d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD55D	5496 bytes
SHA-256: `0c986bb48ec4db26ec3200da0aa33294407cdba599cb303edb8e49c68c6aabb4`
`font_01_sfnt_off0000e7b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7B8	11472 bytes
SHA-256: `42e823b60c9e8893f8b50fc496090d37a2aacf64e8a42398eb72e93f68f6e392`
`font_02_sfnt_off00010cc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CC7	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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