Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be34dbcb68b2082…

MALICIOUS

PDF

161.6 KB Created: 2021-03-06 23:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c8ada844dab097f7a637506262f29a0a SHA-1: c65e0b44b62c93164eb79e037c4b4786a0bed4da SHA-256: 8be34dbcb68b208207367f1404546cab6a8122249d92c698efd60c36b978413f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic indicate an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://jacksth.ru/123?utm_term=macbeth+play+script+translated PDF link annotation
    • https://xefitopabez.weebly.com/uploads/1/3/4/8/134865339/3302073.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/ije3ijQ/scary_movie_2_sound_clips.pdfIn PDF document text
    • http://cpatrump.com/ielts_book_6_test_3_answersgyfa6.pdfIn PDF document text
    • http://nedopivele.22web.org/calories_in_10_dunkin_donuts_munchkins.pdfIn PDF document text
    • http://dezlice.ru/205900469275s2dz.pdfIn PDF document text
    • http://nizuxep.iblogger.org/68687290297.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/86977914512.pdfIn PDF document text
    • http://velesvoyage.ru/which_colleges_are_still_open_for_applications_for_2021_in_south_africakpb7r.pdfIn PDF document text
    • http://tolebexeju.22web.org/what_is_lg_inverter_linear_refrigerator.pdfIn PDF document text
    • http://zedukibawubige.22web.org/shiva_cartoon_movie_full_hd.pdfIn PDF document text
    • http://safodimim.iblogger.org/vehicle_accident_report_form.pdfIn PDF document text
    • https://sefelitajirowa.weebly.com/uploads/1/3/0/9/130969992/c7462f9c6a15e9.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/hibjhiG/racing_point_f1_car_2020.pdfIn PDF document text
    • https://webexopugidoxog.weebly.com/uploads/1/3/4/3/134319438/6525501.pdfIn PDF document text
    • https://magalezofutik.weebly.com/uploads/1/3/4/5/134599277/8807565.pdfIn PDF document text
    • http://successinyourlif.website/50668711489sp5lu.pdfIn PDF document text
    • https://cdn.sqhk.co/tarekekog/KhhuSic/stick_squad_sniper_battlegrounds_mod_apk_5play.pdfIn PDF document text
    • https://zizuvikugit.weebly.com/uploads/1/3/1/3/131384696/01f3bd.pdfIn PDF document text
    • https://jatomotubaw.weebly.com/uploads/1/3/0/7/130739460/rimina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefuwosijar.rf.gd/hp_deskjet_9800_driver_windows_8.1_64_bit.pdfIn PDF document text
    • http://dojidusajotat.epizy.com/california_consumer_privacy_act_2020.pdfIn PDF document text
    • http://dojovosis.rf.gd/61680905354.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_off00024163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24163 5408 bytes
SHA-256: aa345041113c6bd2e02341e78481c29315c8da2099b4365eb2943d0d91bdeb81
font_01_sfnt_off000253c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x253C9 10752 bytes
SHA-256: 1755289fbd833236f6b6a71cab6ba8ce248dc279076a54b3ec493f07dd894ae1

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