Malicious PDF — malware analysis report

Static analysis result for SHA-256 074c912d76b29085…

MALICIOUS

PDF

79.4 KB Created: 2021-05-08 16:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2fbbead187817ff41f1224792acbdbe6 SHA-1: 73e09691c5c6a82162ea5cabbc8e0e8752847440 SHA-256: 074c912d76b2908547c789745af726daea65640013791bdc3b1aa1e86eaafafb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=how+to+clean+salt+chlorinator+cell PDF link annotation
    • http://dufifudusimube.mygamesonline.org/mamonejo.pdfIn PDF document text
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/tiwafujofewadoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457862/normal_6003003eddebe.pdfIn PDF document text
    • https://nibuduki.weebly.com/uploads/1/3/5/3/135314859/guboxon.pdfIn PDF document text
    • https://binaxigaxixin.weebly.com/uploads/1/3/4/8/134864800/fb0f8a5.pdfIn PDF document text
    • https://tuwureliw.weebly.com/uploads/1/3/4/1/134108737/7244801.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/rofojile-vudutawigi-lowelebuwimuso-jofojazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_603034710ad4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5ff146f6d23e2.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/calendario_annuale_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_605f3c87467f6.pdfIn PDF document text
    • http://mebotus.mypressonline.com/zexesafipuninovata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_60516abaae026.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/zoluwivebiro/93257138343.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/febuwosevota.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/backyard_baseball_online_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/kulejixek.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/gurebivatesonux.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/53160879881.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/sulipezutupemifokoseponu.pdfIn PDF document text
    • http://jokosen.atwebpages.com/mi_gente_translation_english_spanish_dictionary_reverso.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/fokuxudebomawuvajobifat.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/43307326246.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/what_is_an_intelligent_battery_charger.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_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 4940 bytes
SHA-256: ac42551eb3ebf4f5695e88ad210428f13fd33cbd80968ed22129c3014d643a27
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 10652 bytes
SHA-256: dbc7e2c00d24a3d0336d69bad66b774e29417b9e65a610d62382d05075a9d087

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