Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dfc023cbd41b27…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 18:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 16c9898e44c826d06a3c81fa8c70813e SHA-1: 13f6b4d3ebc23dc83e6b8399ed82a6e765db3484 SHA-256: 58dfc023cbd41b27e4d3faa067568f931b8cabb69d602d46e57a14549446dc54
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs and the 'Urgency / deadline lure' heuristic further support a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/award?keyword=foundations+of+parasitology+9th+edition PDF link annotation
    • https://xadonuxezi.weebly.com/uploads/1/3/4/1/134131919/xukoz_fiwagutizilis.pdfIn PDF document text
    • http://zootime.store/sc_dmv_driving_test_in_spanishjj9su.pdfIn PDF document text
    • https://jalebipozufi.weebly.com/uploads/1/3/5/3/135320073/6e72deeff5.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/deluvarapo.pdfIn PDF document text
    • https://kirugalepolofaw.weebly.com/uploads/1/3/4/3/134340862/bumuriberojibawawu.pdfIn PDF document text
    • https://tiguxenejizowi.weebly.com/uploads/1/3/4/8/134899735/lurejuzujutoko-tafizikinedevo-jakag-fijafexofo.pdfIn PDF document text
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/rumenenar_sumimukerax_warobimoxavi_kelut.pdfIn PDF document text
    • http://50offshop.info/animated_tab_bar_android_githubenuui.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/gizonukorad/guwivovomevaseputelokana.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/very_tricky_halloween_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/probability_questions_and_answers_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/9145549412.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/c_s_r_f_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/azar_hack_version_apk.pdfIn PDF document text
    • http://refuzopil.epizy.com/how_can_we_fight_climate_change_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/zakoza.pdfIn PDF document text
    • http://waraxiv.rf.gd/baal_veer_episode_1016.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_off0000d3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DB 5400 bytes
SHA-256: 52680d4bc2971fe4a3bb37be72d7b7c40c4f568bc882c177285749041f5f6565
font_01_sfnt_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 10348 bytes
SHA-256: 4034b6a3122f515b7bde93ea3ca0e335bda06382f8b20bca76217a9e9bdd1627
font_02_sfnt_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.