Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9f271a8e69bd25…

MALICIOUS

PDF

75.8 KB Created: 2021-02-26 18:57:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d5a6a3c6392d1efea9444b79b6c4698b SHA-1: 1418ceb647e528b0cb2c95625ee2278a184f0300 SHA-256: 2d9f271a8e69bd2565854a74a17f739a7d5f10cc418ae7035a284862bb01fe40
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Sentry safe lock not opening', suggesting a lure to direct users to malicious websites for phishing or malware delivery. No scripts were extracted, but the presence of many external links indicates a high likelihood of further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=sentry+safe+lock+not+opening PDF link annotation
    • https://cdn.sqhk.co/notigagamu/vhhigib/narararugop.pdfIn PDF document text
    • http://mavpa.fun/the_bell_jar_movie_streaming8qsmw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff7730f1ae04.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/prayers_that_rout_demons_by_john_eckhardt_free_download.pdfIn PDF document text
    • http://cherrypimp.online/89571598885iyxe4.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/ihaJghb/zikizasugutawatamorurapiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489264/normal_5fdf36c62abc8.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/viva_el_toro_book_chapter_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_600596214c74b.pdfIn PDF document text
    • http://snail-case.store/6948017950398nsd.pdfIn PDF document text
    • http://pribor-poverka.site/does_school_need_to_be_capitalizedntc2w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_60129a55349d6.pdfIn PDF document text
    • http://prognoz-football.club/87226455388x6eyh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375206/normal_60036e2f3deda.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/16178874948.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/ibbjjaO/46448671526.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/4721908339.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/nopomewegobij/september_2019_calendar_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/pajudalup.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/zepalanadodozexukixumapo.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/64524085139.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_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 5452 bytes
SHA-256: 5096656f6016daec52e8d82e34da0a89660da569febb95facb45f2c28c3df8e4
font_01_sfnt_off0000fd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 10564 bytes
SHA-256: 020b3855141ef3794d88151ab29ba112d6ec4b003f3cf017368eb6fdecd4e757

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