Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cd4769af976a03…

MALICIOUS

PDF

76.8 KB Created: 2021-02-25 10:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6a730aeb728a548ab1962fe72c0c0538 SHA-1: 9a763afe97f81c5d972c84d36f3881338b7193a2 SHA-256: c3cd4769af976a03aee9966bed21a7f5609ebdbdc7ca1c5cd12e7d7ee8711a17
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, with several pointing to unknown or potentially malicious domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to a 'smart tv manual'. No scripts were extracted, but the presence of numerous external links and the overall structure strongly indicate a phishing or malicious content distribution 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 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.
  • 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://baarspo.ru/wix?keyword=element+32+smart+tv+manual PDF link annotation
    • http://lifeit.pro/pomedaxaufka.pdfIn PDF document text
    • http://yandex-delivery.cc/the_selection_series_book_2_summaryo2rlr.pdfIn PDF document text
    • https://ralutadepijug.weebly.com/uploads/1/3/5/3/135305627/ganizilivaxav-luduf-xalesekowazi-mofanexupujibi.pdfIn PDF document text
    • http://onlinetiser.website/the_lost_heir_dragon_rider_guidez5xxu.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/bimef.pdfIn PDF document text
    • http://cashbackmoney.info/fast_and_furious_7_mp4_hd_download_ibu59v.pdfIn PDF document text
    • http://justamorem.com/742532437516fzdb.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/6c1d075b0bf.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/vefagotoje/how_many_calories_is_a_maple_donut.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/fixed_term_contract_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/sosav.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/komuduxuvinigojusojekezam.pdfIn PDF document text
    • http://gotozowixefe.epizy.com/wezenifobugon.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/mandarin_numbers_1-_10_worksheets.pdfIn PDF document text
    • http://juwiwigepumer.rf.gd/biochemistry_basics_pogil_extension_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/8214606722.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/lavokuvapifusuteboravix.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_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 5144 bytes
SHA-256: 9bf58441c6c0f53256bc8b18b6bb88b80e575f424b024761d49d53442fadf611
font_01_sfnt_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 10196 bytes
SHA-256: 01cadfcb512cdbb22d9807c1a99da106faab68840b963368eebe23f0cc15853f

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