PDF malware analysis — malicious · 67fa024fcb39a1a2

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 06:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fcb20ebf06db1196c12cf422369ad502 SHA-1: 9a8940944754fdcaca8894c2d119c23d0758943e SHA-256: 67fa024fcb39a1a25216a31317e48f4b935bda8d1f410c54cbeac82f3bb8c031

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://mezovuduw.ru/aws?utm_term=real+estate+classes+near+me+massachusetts
- https://cdn-cms.f-static.net/uploads/4462046/normal_5fd76c493512d.pdf
- http://sreda.city/83533498779j9v5j.pdf
- http://naturfresh.space/pesebalukenudulokipejofu7t8bh.pdf
- http://proita.fun/catia_training_reportwe5rd.pdf
- https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/sutiwa.pdf
- http://imm-shoes2.club/formation_autodidacte_exceledaph.pdf
- http://jiwipetafexob.iblogger.org/toyota_rav4_fuel_economy.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/zesixefe/83462411994.pdf
- https://s3.amazonaws.com/wezukep/vapumoduredi.pdf
- http://kawuduzan.rf.gd/reynolds_non_stick_foil_grill_sheets.pdf
- https://s3.amazonaws.com/fokapikow/27118085393.pdf
- https://s3.amazonaws.com/zusevamasor/3ds_max_material_library_free_2012.pdf
- https://s3.amazonaws.com/zunaduxa/def_of_baculiform.pdf
- http://sisigetevi.rf.gd/non_chronological_report_writing_template_ks1.pdf
- https://s3.amazonaws.com/zetubakuz/pajidenuvikomo.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec69.bin` `64a4d7670d989a6a165e991b0e843ef5fe7eac565db296edff76d4cb41be5628`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC69	5044 bytes
`font_01_sfnt_off0000fd65.bin` `2858ec84a37e2d6297e6bd8578f379f52235433386515daccd3cc262a8079d15`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD65	10316 bytes

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