Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e8e60a93531fd…

MALICIOUS

PDF

98.4 KB Created: 2021-01-24 13:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ead20dcbb62f63eacd8b8a5d8eac5f8c SHA-1: 16f7cba4057a51456bbda7758c9a30ad852d28a0 SHA-256: 6e7e8e60a93531fd243e3fa26daa5867937cb7012a033c21caf070e6a168ce04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://jacksth.ru/aws?utm_term=darkness+rises+guide+berserker PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5fe038abd641b.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/sekakegufanepedume.pdfIn PDF document text
    • http://fepotarugagi.22web.org/camscanner_pro_latest_apk.pdfIn PDF document text
    • http://romigeguwapefi.22web.org/suwepulukupajesejosasopob.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/aZghiaa/81183112128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xozelabudizi.epizy.com/53244483297.pdfIn PDF document text
    • http://bubomikofar.epizy.com/2194169300.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/jukebox_the_ghost_good_day_sheet_music.pdfIn PDF document text
    • http://jepafuzezax.epizy.com/8660194353.pdfIn PDF document text
    • http://rebubokinore.epizy.com/nifujolilurusagexotado.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/96999434598.pdfIn PDF document text
    • http://nogomazarem.epizy.com/20833622076.pdfIn PDF document text
    • http://fidotetunuxezi.epizy.com/7040072895.pdfIn PDF document text
    • http://latilofu.rf.gd/top_character_customization_games_android.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/41636739701.pdfIn PDF document text
    • http://menasore.epizy.com/zivimodejewudeliled.pdfIn PDF document text
    • http://dumudolaba.epizy.com/xadarusuvakamelizotida.pdfIn PDF document text
    • http://mopafanimuwez.epizy.com/70397455381.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_off000141d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D8 5164 bytes
SHA-256: fa10bed1049493ede990ff7d8f87bcab5730de5362419e9ff88e4d7606fa1a2e
font_01_sfnt_off00015379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15379 12780 bytes
SHA-256: aead66eb55e148c8a64343d85bf5f3976eebd17e5d70b4948c4e1fec3890774f