Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf4afc08e1b768a…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 04:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 13fcf7c44b60c73ba40ac3f877990cbf SHA-1: eed922da3acf674fdd446cc530b7b9a671a06a6d SHA-256: 0bf4afc08e1b768a2207f96cd4c80ed1c591257c4d408dcba2e8ead75aba584b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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/wix?keyword=frank+parsons+theory PDF link annotation
    • http://xoroketogejuxe.mywebcommunity.org/78678679148.pdfIn PDF document text
    • http://static-get.top/what_weight_oil_in_air_compressorte0wc.pdfIn PDF document text
    • https://firenalurafiva.weebly.com/uploads/1/3/4/8/134883348/juzawapidev.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/what_are_life_liberty_and_property.pdfIn PDF document text
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/3983049.pdfIn PDF document text
    • http://lestyprin.online/dinasowadorunusaluvamoded2zjbh.pdfIn PDF document text
    • http://berefiruzo.mygamesonline.org/symbolic_interactionism_sociology.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/how_to_repair_deltran_battery_tender.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/48690922760.pdfIn PDF document text
    • http://allerop.xyz/wanadoziwu17j4j.pdfIn PDF document text
    • http://bigwin-1xbet.fun/sokafaratodisutiruvibzf4l7.pdfIn PDF document text
    • http://jetavof.sportsontheweb.net/96680398912.pdfIn PDF document text
    • https://fexagire.weebly.com/uploads/1/3/0/7/130775556/2638669.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/33421728533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/lenovo_ideapad_320-_15isk_bios.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/zmodo_h.264_dvr_network_setup.pdfIn PDF document text
    • http://nujugeteteda.myartsonline.com/what_are_the_7_deadly_sins_catholic.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/40289019938.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/40806041553.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/kapulaxekubajuze.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/behlul_danende.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/google_chrome_browser_themes_free.pdfIn PDF document text
    • http://xidalagep.myartsonline.com/chinese_alphabet_a_z.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 4736 bytes
SHA-256: c786fd1523eac84048a7a979a1901f427855a4672e7030a339aa21604c19fa60
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 10896 bytes
SHA-256: 22c49c2c95bf7f77b00c02c56eed216646328dedb50d89c1cabab00a36d75f28
font_02_sfnt_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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