Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f1f40747ae95f7…

MALICIOUS

PDF

70.7 KB Created: 2021-01-28 09:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f66fc6e1558f1c22f520fd0bdce5eaa SHA-1: 3131987b598fc3dbedf44a5a8b56211d6c53d17a SHA-256: a0f1f40747ae95f75d384d2a476e7e24455b7982af810ec18c953c66cf787344
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially malicious websites. The ML classifier also strongly indicated maliciousness.

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://jacksth.ru/wb?keyword=hovercraft%20build%20fly%20retry%20%D0%B2%D0%B7%D0%BB%D0%BE%D0%BC PDF link annotation
    • http://kersita.space/warhammer_age_of_sigmar_realm_war_app_storem19oe.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/6741597.pdfIn PDF document text
    • https://jenajurowob.weebly.com/uploads/1/3/1/4/131408252/makigedutoterovugito.pdfIn PDF document text
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/tedeb-malow-numaparakorekab.pdfIn PDF document text
    • https://rixagaxovexi.weebly.com/uploads/1/3/4/0/134000332/bb892d1247566.pdfIn PDF document text
    • https://menanolunum.weebly.com/uploads/1/3/4/7/134754058/2364880.pdfIn PDF document text
    • http://mandarins.space/8004010705c6apl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405190/normal_5ff678b585974.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/godasodefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470412/normal_5fce502de3df3.pdfIn PDF document text
    • https://datotizit.weebly.com/uploads/1/3/4/6/134696706/koresobira.pdfIn PDF document text
    • http://govejulij.22web.org/sheet_music_beethoven_violin_concerto.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/7343183.pdfIn PDF document text
    • http://zinuxuf.22web.org/angielski_czasy_wszystkie.pdfIn PDF document text
    • https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/sewud-senew.pdfIn PDF document text
    • http://ashotik.space/34150328931e0kvd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surifetopene.epizy.com/55974568761.pdfIn PDF document text
    • http://rovuritag.rf.gd/godzilla_alexandre_desplat_sheet_music.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/xaluzunobo.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/dutujuwovewewijemo.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_off0000d1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EC 5696 bytes
SHA-256: d3d5130dc1e4688d82ae673d634969aefb6f10aa3eaaa4614b3e89c56dadb6d1
font_01_sfnt_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 11232 bytes
SHA-256: 7b2776d31aee7fd9c67cb621e400c3783d9ee210642fcadc0f6e4ac32756ad94

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