Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1d4a56689be9ed…

MALICIOUS

PDF

73.1 KB Created: 2021-02-27 20:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a5e57e2822bd9bf9dc0786c40b3537f1 SHA-1: 89c3bee9ef89d1d0e3bca2e762b2decdc5bfa03c SHA-256: 8d1d4a56689be9ed64f198d3b964992b98f153d1f7cd9ed5c12975df92e1e315
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially obfuscated, suggests a lure related to 'how to do a debate in middle school' which redirects to a suspicious URL. The presence of numerous external URIs and the link farm heuristic indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=how+to+do+a+debate+in+middle+school PDF link annotation
    • http://kleomaften.online/which_colleges_do_not_require_sat_2021vf4xj.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/3e663a72b52626.pdfIn PDF document text
    • http://maewallace.com/72710809093bkkrh.pdfIn PDF document text
    • http://tovelksa.website/nikon_coolpix_s33_not_chargingh7kwd.pdfIn PDF document text
    • http://organic100.fun/king_james_bible_concordance_download8fa62.pdfIn PDF document text
    • http://axecheat1.xyz/23264360922pir.pdfIn PDF document text
    • http://gexedufez.22web.org/nolamiwaxugivab.pdfIn PDF document text
    • http://instapodarok365.site/multicraft_game_free_onlinewg9xu.pdfIn PDF document text
    • http://vovality.club/real_drift_car_racing_apk_5._0._7qmwld.pdfIn PDF document text
    • http://smartcreditus.info/xizadoneladutulanowiguxe5n10.pdfIn PDF document text
    • https://xazupuve.weebly.com/uploads/1/3/4/8/134863790/7650446.pdfIn PDF document text
    • http://help-ruleviolation.com/4206919142ulx73.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/nijudow/53092554145.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/archicad_22_tutorial_for_beginners.pdfIn PDF document text
    • http://tafobinememen.epizy.com/punubi.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/best_anime_mobile_app.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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 5276 bytes
SHA-256: 5bc19837ff75153dcd20103a0baf62c8e88c7fa498eeab9da81d0818eb1ec7e1
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10496 bytes
SHA-256: e12c868e9519dfbda81d77013f38847fbe00dbbc22bf91bec913b1d5a01f9fe3

Open this report in the interactive analyzer, or submit your own file for analysis.