Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab18b7509a801de…

MALICIOUS

PDF

65.3 KB Created: 2021-02-11 13:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 592696e8ad6d85f1c5417e61b2b99f9b SHA-1: 46380ab4ad954c753cd49b0f62da6ce6e86becb5 SHA-256: 3ab18b7509a801de17d44570866dcc790a2af80e9152b9a3068a1e65a62c6909
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of numerous links suggests a link farm or redirection strategy to host 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/123?utm_term=scuba+diving+merit+badge+pamphlet+pdf In PDF document text
    • http://fizovovapoz.iblogger.org/pafamuxiv.pdfIn PDF document text
    • http://jaxaxanukijomel.22web.org/contagion_film_question_answers.pdfIn PDF document text
    • https://joweralifaj.weebly.com/uploads/1/3/4/3/134350132/bbf85df9e7b44.pdfIn PDF document text
    • http://suzaxikuzexaw.66ghz.com/business_address_information_meaning.pdfIn PDF document text
    • http://ronerikasov.22web.org/investigating_science_and_technology_7_answers.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/rigotekoresajod.pdfIn PDF document text
    • http://gusudula.iblogger.org/introvert_vs_extrovert_worksheet.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/rebesudanolo/29374541768.pdfIn PDF document text
    • http://tefuguwo.epizy.com/better_call_saul_wiki_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/75265545147.pdfIn PDF document text
    • http://berojopuzenon.rf.gd/72462859287.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/aix_basic_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/android_tv_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/hubzone_program_certification_sheet.pdfIn PDF document text
    • http://pubamawuxa.epizy.com/little_caesars_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/grade_10_cookery_module_teacher_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/environmental_pollution_journal_author_guidelines.pdfIn PDF document text
    • http://zarusorujot.epizy.com/42159137566.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC280 5696 bytes
SHA-256: 9869217274871e4fdeb4971655aa529606b9e7c7729a91ca08c7227cfd997840
font_01_sfnt_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 10092 bytes
SHA-256: ebdb378af23b71d67fcb0f0c6d96b189ca76a9acf99706c5150769a0343cbb98

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