Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bcccdc340536d9…

MALICIOUS

PDF

75.1 KB Created: 2021-03-17 04:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0a061fb43c3c7f9293217a72db7b10a1 SHA-1: ef56f72da2b575ee99a05c1b4bea72263e915878 SHA-256: 28bcccdc340536d9ffd5e9bc49e8a0a3722c95dcc7b0ef44e6484f5aa1ae1cf9
126 Risk Score

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 it is a phishing or trojan delivery attempt. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to 'Whirlpool gold gas cooktop parts'. The presence of external URIs and link farm heuristics further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jumiwimov.ru/strik?utm_term=whirlpool+gold+gas+cooktop+parts PDF link annotation
    • http://daddytestit.xyz/ch4g2o2gco2g2h2og_type_of_reactionvg2y9.pdfIn PDF document text
    • http://copyright-help-report.com/19898503222shdd2.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/ludosuba-nixadurinuwivap.pdfIn PDF document text
    • http://presentinsta.site/3930804766831ilf.pdfIn PDF document text
    • https://gelasapatawo.weebly.com/uploads/1/3/0/8/130874371/0c3c3.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/pimogijupig_sogoju_fomig_lomiponov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajokibor.epizy.com/jofunun.pdfIn PDF document text
    • http://tiripetejakiwa.rf.gd/49982313992.pdfIn PDF document text
    • http://fujafinu.epizy.com/caperucita_roja_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/ibpsguide_monthly_current_affairs_quiz.pdfIn PDF document text
    • http://pitudug.epizy.com/linemozadamulusesanimiret.pdfIn PDF document text
    • http://sonisan.epizy.com/lenovo_t420_processor_socket.pdfIn PDF document text
    • http://kenukune.rf.gd/long_range_two_way_radios_south_africa.pdfIn PDF document text
    • http://wuzegez.epizy.com/64824897361.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/butekejopowarowijagejotu.pdfIn PDF document text
    • http://peburameg.epizy.com/46390564130.pdfIn PDF document text
    • http://xebinuv.rf.gd/collar_shirt_template_design.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_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 5412 bytes
SHA-256: 7a2dc3936e920faaf687c0357d12c079b114d1555586e36b530324f1701f892b
font_01_sfnt_off0000f863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 10952 bytes
SHA-256: 53f58f81d65b640cfc9d2493472b76f9ff657a907d518b543908199f88d1c816

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