Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bac842b3c655715…

MALICIOUS

PDF

71.1 KB Created: 2021-05-06 02:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: edc7b125897122e6786bac478e820ec3 SHA-1: 2bd7d3c017e72c797195a2a5b62b8946e8fae999 SHA-256: 5bac842b3c655715ffbf08ce48fc419ac66ef5698ca69c829e302f42083f7c8c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic indicating a link farm on disposable hosting strongly suggest the document's purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://botokaw.ru/strik?utm_term=terry+pratchett+hogfather+amazon PDF link annotation
    • http://pusejukaxotip.22web.org/quantitative_aptitude_maths_tricks.pdfIn PDF document text
    • http://vutaturubodud.22web.org/19205640720.pdfIn PDF document text
    • http://arthromedshop.xyz/excel_gantt_chart_template_no_weekendsxyul7.pdfIn PDF document text
    • http://momentshop.space/72512879958nks42.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://gopumapi.iblogger.org/21726515602.pdfIn PDF document text
    • http://bedinujaketapur.22web.org/abdominal_tapping.pdfIn PDF document text
    • http://vinorama.fun/supomoxowos2ikug.pdfIn PDF document text
    • http://xabofawowu.22web.org/business_opportunities_in_south_africa.pdfIn PDF document text
    • http://bozesedixek.mywebcommunity.org/gixoxerofevogonasolajov.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/34337302236.pdfIn PDF document text
    • http://noxavikadovul.mypressonline.com/beneath_this_man_book.pdfIn PDF document text
    • http://seedcraft.online/89152791052sygcy.pdfIn PDF document text
    • http://babblescoop.store/wedawamululugebufans4qlw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pinamagowejut.epizy.com/what_is_penal_system_theory_in_education.pdfIn PDF document text
    • http://likewiwojuxus.atwebpages.com/mivaw.pdfIn PDF document text
    • http://tipipigi.atwebpages.com/boxido.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/jowomarorujipi.pdfIn PDF document text
    • http://kutoduno.rf.gd/6692123685.pdfIn PDF document text
    • http://wokudalewab.rf.gd/rajox.pdfIn PDF document text
    • http://denaruzunus.epizy.com/pemolibesexobatul.pdfIn PDF document text
    • http://bozudob.epizy.com/wunadekovi.pdfIn PDF document text
    • http://xegiseko.epizy.com/fuzukati.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/aura_carlos_fuentes_espaol.pdfIn PDF document text
    • http://bozalusi.epizy.com/sabopifu.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.

FilenameKindSourceSize
font_00_sfnt_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 5060 bytes
SHA-256: ba37588eced317e64326d0d127d159ea16318a515e8078b3a488d304dcf35570
font_01_sfnt_off0000de52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE52 10404 bytes
SHA-256: 341719b44d54b6792df4cb2d70c189465388ebdf92c8cb5a92c0d7e2ad025c6c
font_02_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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