Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7c81c12898c114…

MALICIOUS

PDF

88.1 KB Created: 2021-03-09 07:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f530b2d31f75b11886554fb034e27ca2 SHA-1: 10bf8c3b8b97c29fd9c9274f584ec7c1dae7a7a8 SHA-256: fe7c81c12898c11409c91228617c0122326a5b45a62c59755a7ec5933308230b
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 an urgency-based 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 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/wix?keyword=star+trek+tv+guide+value PDF link annotation
    • https://cdn.sqhk.co/daborofus/vcjc7je/newspaper_horse_racing_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/USc74if/bird_rescue_center_bangalore.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/what_is_the_point_of_amusement_park.pdfIn PDF document text
    • https://cdn.sqhk.co/luwanuriwaba/2ojj1wo/33225418111.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/XTgfigT/magic_mod_minecraft_pe.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/30120999194.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/gisadegof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/rolisef.pdfIn PDF document text
    • http://jizopibijofiz.rf.gd/savogilasuredi.pdfIn PDF document text
    • http://boxomivesamazi.epizy.com/birdsong_tv_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b156c78c-3584-4de6-979f-a35e21aa00e3/53466715219.pdfIn PDF document text
    • http://xejonitofopim.epizy.com/age_of_empires_2_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/diwutidaperube.pdfIn PDF document text
    • http://tevezizexuvifuj.epizy.com/21163007120.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/the_leftovers_season_1_episode_8_review.pdfIn PDF document text
    • http://nibejodawugizex.rf.gd/cg_police_si_admit_card_2018.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/nafudedeperemabosuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41fbcb1-435a-4225-a8f8-80b56d49a2d9/xerox_workcentre_7855_reset_admin_password.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/anushka_sharma_images_free.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_off00011ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 5040 bytes
SHA-256: dbf03a51a2964d03debecd317a6f315cb9d735835c994cd8e09a7ae2beb43e97
font_01_sfnt_off00012e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 10948 bytes
SHA-256: a6bee230864d8013ef675c55d53fa3191b5e9aa5dfef0a37054551406fc90d1d

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