Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9e3d0afd92aa0e…

MALICIOUS

PDF

72.5 KB Created: 2021-03-19 17:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77495515a9bf90557f17bb0a7bde9c79 SHA-1: 20bb273c957fa784ca261f91c747a6af0e0ea7c4 SHA-256: 2a9e3d0afd92aa0e0a509081505d3352c1c7a1e464379ad219487ccfe0a3ac33
186 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. 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 0.9997

Heuristics 6

  • 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 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.
  • 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://bologen.ru/award?keyword=adobe+animate+tutorial+pdf PDF link annotation
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/88556.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/bFTejdS/zajoduvosowitixibu.pdfIn PDF document text
    • https://cdn.sqhk.co/wenoxavawo/cigPjeS/vomiting_covid_toddler.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476142/normal_5fcb5455e2c1a.pdfIn PDF document text
    • http://good-production18.site/7767543324917dix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_602640dc985d3.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/33hh7am/sudigotolilemi.pdfIn PDF document text
    • http://kellys.space/recoleccion_de_datos_concepto2y8of.pdfIn PDF document text
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/f028bcdfd3c22f.pdfIn PDF document text
    • https://jojiwunu.weebly.com/uploads/1/3/5/3/135387754/mamubuva-lamudaxibe-juvodexexa-zadepados.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_602b3bb491f3d.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/igjehjm/best_players_fifa_20_career_mode_wonderkids.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/jghjdgc/21750918972.pdfIn PDF document text
    • http://antonioit.fun/19267256196gz3y1.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/advertising_vocabulary_list.pdfIn PDF document text
    • http://vukabakoxipus.22web.org/texoxeserefuradabifome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivajopafovile.rf.gd/vias_de_absorcion_de_los_farmacos.pdfIn PDF document text
    • http://golofupatawef.epizy.com/best_free_audio_song_site.pdfIn PDF document text
    • http://jetijawutapa.epizy.com/gewugemipewixesawugogur.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_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 5140 bytes
SHA-256: 9d0c9b991b3853449e3ee1325458e88f31bec88703e2ba5ef5a795f0b191834a
font_01_sfnt_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 10084 bytes
SHA-256: 94ca4d52e229de89d239874ff7a1fedaa49ca7ac4ec7fb4ce55c14394aedcf74

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