Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8480e96b0d4fed1…

MALICIOUS

PDF

70.8 KB Created: 2021-02-21 11:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 74e4dcf8ee0032acd383c1e4bd7c0269 SHA-1: d5a53515fb0608e3de8d2233a996a75ae78aaaae SHA-256: b8480e96b0d4fed18b5944c6d750be59c2eaa4e6bab4e3d1ce66de96087cdbca
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to potentially malicious or unknown domains, and is flagged as a redirector link farm. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/strik?utm_term=elgato+system+requirements In PDF document text
    • https://wesuzijuto.weebly.com/uploads/1/3/0/7/130740493/jujitikodibiga-tukowip-kunofivi.pdfIn PDF document text
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/josavivifoxuxuziw.pdfIn PDF document text
    • http://memexeti.66ghz.com/beyblade_games_uptodown.pdfIn PDF document text
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/4219045.pdfIn PDF document text
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/bimusafek-xuzofaxo-zevetaposesore.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/7236250.pdfIn PDF document text
    • https://kabaposirivapej.weebly.com/uploads/1/3/2/6/132680813/d6bce21c6.pdfIn PDF document text
    • http://com-signto6.xyz/46155813158h8sn4.pdfIn PDF document text
    • https://sazukigozozabep.weebly.com/uploads/1/3/4/3/134310948/xijefamejuwuz_bifal.pdfIn PDF document text
    • http://wajuxerisowo.iblogger.org/randomness_and_probability_crossword_answers.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/senodiw/fluke_117_323_datasheet.pdfIn PDF document text
    • http://dolufin.epizy.com/samsung_battery_pack_9000mah_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/smart_waste_management_using_iot_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/reragabi.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/my_whirlpool_cabrio_washer_wont_spin_or_drain.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/xivikik.pdfIn PDF document text
    • http://norilonabu.epizy.com/72418967093.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/donation_receipt_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/best_cordless_phones_with_answering_machine_2019.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_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 5192 bytes
SHA-256: 4216737ba612a23f7c28e60b352ee607970b1fb4a798c4d13917bbc1dee0e85c
font_01_sfnt_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 10036 bytes
SHA-256: 8235d652abd7363acd000e5d7e1e055f0fe1135e7050cd147b279ba4fc0dbc0c

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