Malicious PDF — malware analysis report

Static analysis result for SHA-256 124e896371e964f2…

MALICIOUS

PDF

77.3 KB Created: 2021-03-02 16:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d7b1f21874d49880e84e30bfcc4c5f74 SHA-1: 8cc6fe44b8fb1483720de040f3890b77491368af SHA-256: 124e896371e964f240f6325fec8eb2e0dab720592394d9eae2a8d45e77fc427d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, including one that appears to be a lure for search engine optimization, and another that directly points to a PDF file on a disposable hosting domain. The presence of these links suggests an attempt to redirect users to malicious content or download further malware.

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://soxebez.ru/award?keyword=what+is+the+most+accurate+myers+briggs+test PDF link annotation
    • http://extrameets.fun/beagle_breeders_ma6g7o5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_60245098e6a65.pdfIn PDF document text
    • http://wordsidepost.top/basic_accounting_journal_entries_practicefa9ws.pdfIn PDF document text
    • http://ourfanz.com/35752370623wxrhn.pdfIn PDF document text
    • http://pedron.fun/nadubuxuxagomorux1qdqt.pdfIn PDF document text
    • http://ihsteam.ru/what_age_group_is_warrior_cats_books_forlbhbx.pdfIn PDF document text
    • http://kakigomumarob.22web.org/dinagi.pdfIn PDF document text
    • http://gupiduwexe.22web.org/baghban_song_songspk.pdfIn PDF document text
    • http://falanog.iblogger.org/ti_nspire_cx_ii_vs_cx.pdfIn PDF document text
    • http://rubisteq.online/250713049xj4ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_6004e05d66f70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444643/normal_5ffc4d9286357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_6027ee4a40009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karerob.epizy.com/duxaninelejelutewalegotir.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/battleship_2_tamil_dubbed_movie_tamilrockers.pdfIn PDF document text
    • http://dogelatam.rf.gd/thinkcentre_m700_beep_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/garupobegotuvubif.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/wiwisubuwobogoxujizazalo.pdfIn PDF document text
    • http://paguvodusijuwef.epizy.com/how_to_do_line_drawing.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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5436 bytes
SHA-256: 2ccc3b9768b211985c0f94adbce232d35a07a9cc610eeae60df8b6932eace536
font_01_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 10624 bytes
SHA-256: 89ca7594bc61d14d2059b5c954ed6483b4638089f02e9abd34511701599af6ec

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