Malicious PDF — malware analysis report

Static analysis result for SHA-256 854ad30771839e59…

MALICIOUS

PDF

69.0 KB Created: 2021-03-27 15:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06b43d318180b9a59f58e573012bb9e7 SHA-1: 5f92b03c843b643dfff021b7e3559e86a978ac68 SHA-256: 854ad30771839e592f96bb7741ff29d8acd679d3e1df767d68e1d1cb00b31b37
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=craigslist+cabo+san+lucas+cars PDF link annotation
    • http://josamaduxano.22web.org/how_to_clean_protein_shaker_bottle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_60221a23628c3.pdfIn PDF document text
    • http://pijebum.iblogger.org/other_names_for_daybed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_60394dcf4a062.pdfIn PDF document text
    • http://rufisurerupu.iblogger.org/resume_template_doctor.pdfIn PDF document text
    • http://qqkaxes.xyz/how_to_find_projectile_motion_maximum_heightjl19e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_601ca35d25df0.pdfIn PDF document text
    • http://kudretbozaci.com/cycle_cycle_dance_performancelmzop.pdfIn PDF document text
    • http://bigowet.xyz/the_art_of_conversation_bookxz47g.pdfIn PDF document text
    • http://sexasuwodig.iblogger.org/68387262373.pdfIn PDF document text
    • http://afracheat8.xyz/stock_market_news_today_youtubeksciw.pdfIn PDF document text
    • http://mixit.info/cirque_du_freak_book_7nds3d.pdfIn PDF document text
    • http://buloshnaya.site/valezut14m67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenejifawulo.epizy.com/39521632248.pdfIn PDF document text
    • http://kesajuwigiferu.epizy.com/57784535004.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/4447948804.pdfIn PDF document text
    • http://gowefemum.epizy.com/15708555515.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/sheet_metal_duct_fabrication_los_angeles.pdfIn PDF document text
    • http://disupenepoka.epizy.com/advanced_filter_in_excel.pdfIn PDF document text
    • http://gomirisepu.epizy.com/himno_nacional_de_honduras_completo_con_letra.pdfIn PDF document text
    • http://xilavugepiw.rf.gd/67137474993.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_off0000d0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FE 5012 bytes
SHA-256: b50595cb778b4c7a09205b5ceba07eefa2e94371e7caed713d57e1a7592414a7
font_01_sfnt_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 10264 bytes
SHA-256: cc55be4e34c0a28f9acb1ec04a2c737a7279b69dc740844f04b4de9ad560b650