Malicious PDF — malware analysis report

Static analysis result for SHA-256 97410b6137acefca…

MALICIOUS

PDF

78.4 KB Created: 2021-03-23 01:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f4ae295ccfed201735a78a7b925a7787 SHA-1: b7a8dbf604169eb1efc8fecbe25618f0d2e14d14 SHA-256: 97410b6137acefca887256b37cbc961f245ab628d80c2322adb468173fa413d0
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'crophysi.ru', suggests the document is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a large number of links on disposable hosting, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crophysi.ru/award?keyword=canon+eos+7d+instruction+manual+pdf PDF link annotation
    • http://fibilif.iblogger.org/mutual_agreement_employment_termination_template.pdfIn PDF document text
    • https://japutiluzot.weebly.com/uploads/1/3/5/9/135991977/fa6e067d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_60391fdd8917a.pdfIn PDF document text
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/fivabeputise_bigorokeziwide_jivuwok_josilapojipodus.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/butazobejexilapenupajivap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5fe9dd77a1a29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_6008e43f3a6fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5fdf7d14a89b5.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/xenetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_6011ef569d15e.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/how_to_thread_a_janome_my_style_100_sewing_machine.pdfIn PDF document text
    • http://pizidojokinesa.66ghz.com/11395245786.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/guzeb.pdfIn PDF document text
    • http://rixujewo.getenjoyment.net/2001_suzuki_intruder_vs800_forward_controls.pdfIn PDF document text
    • http://vojupobakovax.iblogger.org/minimal_pairs_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poramukuwulaji.epizy.com/nursing_competitive_exam_questions_and_answers.pdfIn PDF document text
    • http://dupozeb.rf.gd/60586113575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2321cad-b6ac-40b1-8944-a7e7e9d48038/much_ado_about_nothing_cast_2020.pdfIn PDF document text
    • http://setovoj.onlinewebshop.net/list_of_diploma_courses_after_10th.pdfIn PDF document text
    • http://vizomonuzujo.onlinewebshop.net/21763141310.pdfIn PDF document text
    • http://nimesirasono.rf.gd/30495006982.pdfIn PDF document text
    • http://fimuwudefixolet.epizy.com/how_to_replace_a_fios_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebc2de9-04bd-4c86-8687-aa2914808c9a/brother_hl3170cdw_toner_reset.pdfIn PDF document text
    • http://lefegosab.epizy.com/aviva_supplementary_application_form.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_off0000f625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 5284 bytes
SHA-256: de7209f8792c4538bba34704f61141018acfd5b5c4e0e6ce3da5af3980e5f027
font_01_sfnt_off0001080e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 10644 bytes
SHA-256: aa28975828793c7615220669512aac98a6c85738dbd492ed6dd43714aed7bcd2