Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdca4bf56a3db14…

MALICIOUS

PDF

81.3 KB Created: 2021-04-06 06:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 42366f3142ab687e2981235dc4991067 SHA-1: a5e0df652c07903e3213e71d3e762412b30649bf SHA-256: 0fdca4bf56a3db14d336850fc0a3ae6bbb6505359334d6c7867d55034e21ff35
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to disposable domains, and includes a call-to-action button lure. The primary URL suggests a phishing attempt related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=apk+editor+pro+free+download+2020 PDF link annotation
    • http://vuvulusigi.scienceontheweb.net/my_hp_photosmart_printer_is_offline_how_do_i_fix_it.pdfIn PDF document text
    • http://naturapple.space/online_aadhar_by_aadhaar_numbernsptt.pdfIn PDF document text
    • http://study-english-05.site/hp_probook_6470b_specificationsq8mce.pdfIn PDF document text
    • http://larts.digital/memetob5fhsw.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/19916215083.pdfIn PDF document text
    • http://wivupivipewezap.mygamesonline.org/guide_to_the_astral_plane.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/nimotarawufiporilopetujv9du.pdfIn PDF document text
    • http://watogoda.mypressonline.com/invention_of_telephone.pdfIn PDF document text
    • http://meetsucre.pro/good_behavior_chart_template_free7n8he.pdfIn PDF document text
    • http://waxawazurutane.22web.org/60698147304.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/mozipazewexivenutufukeme.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/botanique_at_bartley_floor_plan.pdfIn PDF document text
    • http://dress-russia.ru/bostitch_roofing_nailer_siding_attachmentcqdr6.pdfIn PDF document text
    • http://samyog.ru/wipijg4tn9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenuduximowub.epizy.com/how_to_properly_put_a_book_title_in_an_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/38816795348.pdfIn PDF document text
    • http://naburonip.myartsonline.com/acc_aha_guidelines_2020.pdfIn PDF document text
    • http://mujigakevomo.epizy.com/federafodubujera.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/zuzefowi.pdfIn PDF document text
    • http://sozidimimu.rf.gd/13700589708.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/new_banjara_dj_songs_com.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/puducherry_government_list_of_holidays_2020.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_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 5276 bytes
SHA-256: 93df8da55f29e2950e1a688c566016550c6a51fa780cefd89e834fd149601eac
font_01_sfnt_off0001134d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134D 10484 bytes
SHA-256: 637d8d99156d3ef0e0a9bd9badac350e1a9a314c18e6be154b938f38eed86615

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