Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbaedb635972703…

MALICIOUS

PDF

77.8 KB Created: 2021-02-27 23:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7a7028806b5efc1e0267b2d9a4492ef3 SHA-1: 3affb1446f0a825cb120c5ae8cae007f2fa8297a SHA-256: 1bbaedb635972703d3392a1dd170bcc55274b594a314a953a70af5452642d9e4
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/wix?keyword=retired+guide+dogs+victoria PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414153/normal_5ffb7996e6f12.pdfIn PDF document text
    • http://alisaborodaenko.design/minnesota_twins_trade_rumors_bleacher_report4lmjv.pdfIn PDF document text
    • http://jizimawaguda.22web.org/el_hombre_mas_rico_de_babilonia_resumen.pdfIn PDF document text
    • http://trokot-online.xyz/19262529163bf7d3.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/josojolovo.pdfIn PDF document text
    • http://sqrab.top/mixed_mole_practice_problems_worksheet_answers2mbyh.pdfIn PDF document text
    • http://weareanonymous.org/mavebe1473o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60181c46eb204.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/6315768.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/3bb7d4d.pdfIn PDF document text
    • https://manasuxejorodi.weebly.com/uploads/1/3/1/6/131606962/bapepijovatowajab.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/how_do_i_reset_my_canon_pixma_mx922_printer.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
    • http://rodedewezijore.atwebpages.com/who_owns_the_christmas_tree_shops.pdfIn PDF document text
    • http://rozipiliwune.epizy.com/interesting_maths_puzzle_questions_with_answers.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_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 4916 bytes
SHA-256: c2e9e3512ac7b438ffbb97e0f039ad9af7d67849eee1b73f25b4a63804588148
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10460 bytes
SHA-256: a1da5e452ca7b269dff7ed979baa1dc8250ee8b2842d00a16672706d5c7757f5
font_02_sfnt_off00011ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3