Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7882494346f6316…

MALICIOUS

PDF

68.3 KB Created: 2021-04-05 11:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 03b54a6f6e46c247a580822057a1c02b SHA-1: b1740cf6547980c7f3eb82b2ae6286da846a146f SHA-256: a7882494346f6316387fa11a380994f07a8c49997cf226495add7fc3aaddee0f
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://lozipotod.ru/123?utm_term=teor%25C3%25ADa+e+historia+del+cartel+publicitario+pdf PDF link annotation
    • https://cdn.sqhk.co/zavilisuga/jbai3TV/30905278967.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavazer/tgfhhhk/islands_for_sale_in_the_caribbean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_600e86cf1b9fd.pdfIn PDF document text
    • https://morexenuf.weebly.com/uploads/1/3/5/3/135311883/lejozi_xanep_nuwulufekabewi_bopoto.pdfIn PDF document text
    • https://vukuwapebu.weebly.com/uploads/1/3/5/3/135310377/4145119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_603ce5d65e0e5.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/jgcsugc/fimetetezadigiwi.pdfIn PDF document text
    • http://lozepamubi.iblogger.org/55362427022.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/gudulolomamuvo.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/viboxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumikatumisi.rf.gd/how_to_make_an_advent_calendar_out_of_toilet_paper_rolls.pdfIn PDF document text
    • http://nulabede.epizy.com/xukafepamirifofowas.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/balloon_games_pc.pdfIn PDF document text
    • http://zarusorujot.epizy.com/counter_strike_1._6_original_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e37296b-5f92-4880-bb7b-b8160225a3d2/flysky_th9x_compatible_receivers.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/android_mobile_ussd_codes.pdfIn PDF document text
    • http://ramuzetajomi.rf.gd/98190081203.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/descargar_test_de_raven_completo_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576b3a36-a42c-437a-b087-878181c4deba/98813138526.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD9 5384 bytes
SHA-256: 9bf065524a34aabfdfe0459056eb630716e1386cad29c254acd83d4617849fac
font_01_sfnt_off0000df1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 11248 bytes
SHA-256: 6a279f706a397aab089c18be36c15c26b2bea82011950f807a3f9a54bd946a41

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