Malicious PDF — malware analysis report

Static analysis result for SHA-256 355a55408eca772b…

MALICIOUS

PDF

81.5 KB Created: 2021-02-20 17:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ca04dc4507d97a68369393c5c55d762f SHA-1: 91eccff124d6ee95706361fabc23ed9ac7256554 SHA-256: 355a55408eca772bf3ff5837547c95444b362f7326c419fc93dee878dd4418a3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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://crophysi.ru/wix?keyword=hoover+dual+power+max+carpet+washer+owners+manual PDF link annotation
    • https://cdn.sqhk.co/nodomepe/Fiagd2l/22775659059.pdfIn PDF document text
    • http://chategratis.online/my_friend_cayla_doll_app_iphone7enky.pdfIn PDF document text
    • http://justamorem.com/manual_transmission_fluid_change_jeep_tjtpe54.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/oUUgcJV/repizelejeb.pdfIn PDF document text
    • https://lezexoxutipeb.weebly.com/uploads/1/3/4/4/134462335/092e214b9633a9.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/naxinuxukub09o0k.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/c1f788f4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459062/normal_5fec98b43308e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_6016fb1b8ab3a.pdfIn PDF document text
    • https://mijibetifud.weebly.com/uploads/1/3/4/6/134653630/vubilowipapofape.pdfIn PDF document text
    • https://jugafuxuxeg.weebly.com/uploads/1/3/2/7/132740719/xotugabujewewodema.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/3917396.pdfIn PDF document text
    • http://lefavapexusa.iblogger.org/92626818591.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/pokutuxovazitumakoguw19hkg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezivepe.rf.gd/xixifigafenukipe.pdfIn PDF document text
    • http://matogidujizovoj.epizy.com/adelaide_botanic_high_school_information_night.pdfIn PDF document text
    • http://zujexig.epizy.com/american_revolution_battles_worksheet.pdfIn PDF document text
    • http://jufamupubo.epizy.com/best_offline_gps_navigation_apps_for_android.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.

FilenameKindSourceSize
font_00_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 5496 bytes
SHA-256: 73d31e8a76375f371069e9a5923e6045b6dade1b04ffa2b71d5a8f204f86234f
font_01_sfnt_off00011556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 10208 bytes
SHA-256: d027b1e29617bf82229ee60bb94cdd99b003ebd8719b26ba77d5a031535cacd9

Open this report in the interactive analyzer, or submit your own file for analysis.