Malicious PDF — malware analysis report

Static analysis result for SHA-256 0028d16ae045b094…

MALICIOUS

PDF

73.5 KB Created: 2021-04-05 20:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ab52078b08dd0014d16b43efbfe6f114 SHA-1: c33199afe18b125d9db3cb797b48a0b77c419400 SHA-256: 0028d16ae045b0940936dd4df9af90b61a6442b142331c7ec08bf59aa7651c69
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 0.9996

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://botokaw.ru/123?utm_term=cloverdale+weather+report PDF link annotation
    • http://nuveclovet.xyz/13372831855zsmt6.pdfIn PDF document text
    • http://datinge.site/hardboiled_eggs_ovenjeiuc.pdfIn PDF document text
    • http://copyrightreports.com/12397203782rkp6r.pdfIn PDF document text
    • http://kelnoteres.xyz/how_much_does_it_cost_to_maintain_a_prius_c_battery7c8m5.pdfIn PDF document text
    • http://cmbclientes.com/how_can_i_boost_my_hotspot_signali83g7.pdfIn PDF document text
    • http://probkin34.xyz/warcraft_chronicle_volume_1ixabi.pdfIn PDF document text
    • http://durasazi.iblogger.org/bachana_bilal_khan_mp4.pdfIn PDF document text
    • http://saporik.scienceontheweb.net/verbal_ability_and_reading_comprehension_by_pearson.pdfIn PDF document text
    • http://usblighter24.site/how_to_calculate_circle_volumezxryr.pdfIn PDF document text
    • https://nuzaxegef.weebly.com/uploads/1/3/4/8/134857273/nezagiwolow-xaxub.pdfIn PDF document text
    • http://edapog.online/70741414823p4vub.pdfIn PDF document text
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/ee443b05ab0c.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/pobowue9ly4.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/avid_elixir_bleed_instructions.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/wakisalamuzubupawateduw.pdfIn PDF document text
    • http://justamorem.com/93123980252eeac9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuripoda.epizy.com/53804235266.pdfIn PDF document text
    • http://rogomore.myartsonline.com/61563963283.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/the_missionary_position_christopher_hitchens_review.pdfIn PDF document text
    • http://domuromu.atwebpages.com/network_cable_tester_manual.pdfIn PDF document text
    • http://sejojoxo.epizy.com/48062410001.pdfIn PDF document text
    • http://binefiwir.rf.gd/debate_motions.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_off0000e11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11E 4924 bytes
SHA-256: a24985b0f88f8055b21b5971f8d370bd8b6c2d295b6359a5a1128276f61a3dc4
font_01_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 11016 bytes
SHA-256: b1fdde2190148ee0db19b8c524d70e88a6315be1b835f609a1c4f0bf80dedfbe