PDF malware analysis — malicious · facbaa65296e962c

MALICIOUS

PDF

77.9 KB Created: 2021-04-03 23:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 0d1376a84c84987b3e9dd086cf894bf2 SHA-1: 1ebc6456cc87930255931fa3e40e3ed8d781ba43 SHA-256: facbaa65296e962ce4e38a54eeaf78ae06ec8647caadafe9f2998ddf4c8d4f09

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/wix?keyword=speak+up+3rd+edition+pdf+free PDF link annotation
- http://gazinukonap.iblogger.org/26470887213.pdfIn PDF document text
- https://cdn.sqhk.co/zafilivopupu/icidjit/kafov.pdfIn PDF document text
- https://cdn.sqhk.co/kugefiruxat/icgihg1/pobotozatisizunev.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403534/normal_5fda6664a5fd2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477635/normal_6040e92432c38.pdfIn PDF document text
- https://cdn.sqhk.co/nuzitomizaj/MYhhZib/10891938424.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366973/normal_602876e11e0e3.pdfIn PDF document text
- https://cdn.sqhk.co/murefazomejo/oAgiih1/witinizekegopufunurazoje.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/01c1f962-3f04-41bb-89dd-fd459fc99706/how_much_do_special_education_assistants_make.pdfIn PDF document text
- http://moxedudorilo.rf.gd/statistical_software_quality_assurance.pdfIn PDF document text
- http://tabojiterakan.rf.gd/anuradha_paudwal_bhajan_ringtone_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7e613f76-06f5-458d-9851-0c30f39ea035/93968940036.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/889f33a0-bf1b-483a-b661-6531468d9294/how_long_to_learn_final_cut_pro_reddit.pdfIn PDF document text
- http://rowomikaxanuga.rf.gd/lavirufisilijap.pdfIn PDF document text
- https://s3.amazonaws.com/xuxifuzituwu/wobijozujurisufazikaw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cfda1779-ddd1-44c1-9e11-3e7a059f59fa/83600279907.pdfIn PDF document text
- https://s3.amazonaws.com/kuboki/commoncoresheets_vertical_division_with_a_helper_grid.pdfIn PDF document text
- https://s3.amazonaws.com/gisujubolidine/91347291930.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/546c0a4d-0eec-4418-b174-1704a8e459c9/apc_ups_blinking_battery_icon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43a2c911-e764-4c22-8161-f17a74c2065b/what_do_the_words_pax_romana_mean_in_latin.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1607e93c-fbaa-406c-bd1a-05d1a5926485/gusilodosoloxosize.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_off0000e66f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE66F	2828 bytes
SHA-256: `eec2311198495a4bc353016469730966835d49679daeed18a98faa9ab15954d4`
`font_01_sfnt_off0000f079.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF079	5156 bytes
SHA-256: `f0cebdee4ffe1f8d0ea1a870c68a6cb1c6b309efc1e5fee868be96923a19aac2`
`font_02_sfnt_off0001021a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1021A	12644 bytes
SHA-256: `b76ecd79990be02b0c2fa5920585c55e7dafb83b1dc1d45f62d88de993b7f420`

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