Malicious PDF — malware analysis report

Static analysis result for SHA-256 19411dcdf31f6534…

MALICIOUS

PDF

84.6 KB Created: 2021-03-10 00:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 862863bc5575095c7f8367781aabf4bf SHA-1: 710fed99185edfca58f2c4c507f4278343ab2fd0 SHA-256: 19411dcdf31f6534225ffd6b36aca1dbc444cdbe1977e5cf19e6b902798525bb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to search terms, likely intended to trick users into clicking through to the external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/wb?keyword=ge%20oven%20self%20clean%20f2 PDF link annotation
    • http://pifofobexaxel.mypressonline.com/atoms_form_bonds_with_one_another.pdfIn PDF document text
    • http://niwifara.22web.org/4674201756.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/yjgfzCy/94357517738.pdfIn PDF document text
    • https://cdn.sqhk.co/panufarubel/5qiaiid/wolo_tv_news_team.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/cOupo5W/92740895236.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/jaligopozujalatizuse.pdfIn PDF document text
    • http://pikorugijelajo.iblogger.org/hp_photosmart_7760_printer_power_cord.pdfIn PDF document text
    • http://xaduwufuwa.22web.org/53842612858.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/crock_pot_smart_pot_7_quart.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/88636066029.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/zojepeled.pdfIn PDF document text
    • http://jotepuxigavof.iblogger.org/burdened_with_crossword_answer.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/airport_codes_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizizezuk.epizy.com/5_tibetan_rites_reviews.pdfIn PDF document text
    • http://gijafusatuvaxoj.rf.gd/waxelakuk.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_f2498b55aa6245a3ae6cd45467f32f43.pdf?index=trueIn PDF document text
    • http://kixixiwibatogit.epizy.com/asco_guideline_breast_cancer.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/casio_scientific_calculator_fx-115es_plus_price.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_9d07b5310306410081f6d2043ce30a0a.pdf?index=trueIn PDF document text
    • http://wabiredozu.rf.gd/bb_link_mac.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/types_of_deep_cycle_batteries.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/what_is_scientific_method_summary.pdfIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_03b675d9a3664d7fb70a11c08a52b931.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 5000 bytes
SHA-256: ac8f6da18a9761fa98b18e031c620e1d378a9098fa71f926f7bdbb83792a5611
font_01_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 10484 bytes
SHA-256: 81067aabb0da75132799a9509fd95c77064fe8d4e38b780905553119af9c1cec
font_02_sfnt_off00012f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F68 16108 bytes
SHA-256: e6fceaab8a3641b5079bdfa63bd872fb2a02bd7cd09ba0e2824fed39111bc42d

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