Malicious PDF — malware analysis report

Static analysis result for SHA-256 d713c797a8836444…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 00:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1359a9ad478041fb8e362beffad89aa8 SHA-1: aed443d882ae2f4dcd2a9c542e6c0c009bad68d0 SHA-256: d713c797a88364440fa3ea833fb685cbd6d6d82e90c6bf1768e8728dc601edb6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://crophysi.ru/wix?keyword=accounting+policies+and+procedures+manual+for+construction+company`. The ML classifier and ClamAV also flagged this file as malicious. The presence of embedded URLs and the nature of the detected threat suggest a phishing attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/wix?keyword=accounting+policies+and+procedures+manual+for+construction+company In PDF document text
    • http://sidegut.22web.org/99073225238.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/vukunovuxit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464523/normal_5ff2b1dd5adb1.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/5957493.pdfIn PDF document text
    • http://cadenalia.com/drama_script00c83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5ff2ba5d74373.pdfIn PDF document text
    • https://fusarutuzazeni.weebly.com/uploads/1/3/5/3/135346017/wowomek.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/pefopeperolupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fee020403546.pdfIn PDF document text
    • http://dhl-order.info/places_to_donate_clothes_and_shoes_near_me1ovqi.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/P4i2Khd/93647421976.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/ewKgewP/game_server_control_panel_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459467/normal_5ff9d3ccabcd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5fcf0cc80c336.pdfIn PDF document text
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/5571271.pdfIn PDF document text
    • http://vertigoa.online/fegadivr63k.pdfIn PDF document text
    • https://lidafuxabu.weebly.com/uploads/1/3/4/8/134891514/08ce2a96.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/iiaijjU/10730079579.pdfIn PDF document text
    • http://cardioactiveufficiale.site/what_does_the_phrase_peace_offering_mean4ixub.pdfIn PDF document text
    • http://govusinixarimi.iblogger.org/92928592238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tativukowodugox.epizy.com/adobe_acrobat_reader_pro_xi_11.pdfIn PDF document text
    • http://gidubabe.myartsonline.com/is_blast_protection_worth_it.pdfIn PDF document text
    • http://tatasuvuputo.epizy.com/excel_bedingte_formatierung_2_zellen_vergleichen.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_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 5564 bytes
SHA-256: 5265584190d2e005231fa7ee24cacda3da726ca5bea8754951925e571c492647
font_01_sfnt_off00011129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11129 10372 bytes
SHA-256: 31e939a3ed70106a0cc97548a2de9dfbbcd0e334ac2f64b1e29189a14d6d63d9

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