Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade2d2a6c7574adf…

MALICIOUS

PDF

83.8 KB Created: 2021-04-23 21:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7eb951ae8f05c440bdb24c4af951a113 SHA-1: d1d974273319ff70821a3a24db4a6621b5aa89a9 SHA-256: ade2d2a6c7574adf30413e2be62d5e88c5907986480c7c4bd73ae245467dd9d8
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URL 'https://gimoguvi.ru/strik?utm_term=common+core+standards+hawaii' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/strik?utm_term=common+core+standards+hawaii PDF link annotation
    • http://dorutote.scienceontheweb.net/clerks_private_award.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/the_lord_of_the_rings_the_return_of_the_king_video_game_steam.pdfIn PDF document text
    • http://nejamaranidirit.22web.org/83894403241.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/nudelakil.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/XVFidhd/tozejesuxip.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/PAg4Khg/21525453541.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/discounted_payback_period_definition.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/weight_loss_meal_plan_download.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/how_to_reschedule_your_dmv_appointment.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/jdkDFiD/killer_bean_unleashed_download_uptodown.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/setaxilitozuko/11174748452.pdfIn PDF document text
    • http://vemijapumobikik.epizy.com/ageless_body_timeless_mind.pdfIn PDF document text
    • http://nevegeb.rf.gd/tipos_de_bivalvos.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/ff14_botanist_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/1565599648.pdfIn PDF document text
    • http://sasitegeke.epizy.com/biological_father_medical_history_form.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/shaken_baby_syndrome_facts.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/rhyming_words_dictionary_free_download.pdfIn PDF document text
    • http://sinomol.epizy.com/medicinal_chemistry_books_yogeshwari_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/putereda.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/racing_vs_boca_2018_formaciones.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/simple_family_tree_chart_template.pdfIn PDF document text
    • http://xawexixiwa.rf.gd/convexity_and_duration.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_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 5052 bytes
SHA-256: 038f51e5c30251bf295c182188ce6b21fa93330780a32f321e007eafac38fcca
font_01_sfnt_off00010e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 10964 bytes
SHA-256: bff4c6079f7478a1d805e7ee4b70cf2bb248982fdcd996e753ac7c96d2fcf3cc
font_02_sfnt_off0001336e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e