Malicious PDF — malware analysis report

Static analysis result for SHA-256 02632c2be7391bc9…

MALICIOUS

PDF

81.3 KB Created: 2021-01-17 14:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d1a20de6b15e511b50e11979d6fd0042 SHA-1: baff33fcadef5fb51acf7df263e42aed717288fd SHA-256: 02632c2be7391bc97fca6931b701812e7a59a2f144a8afbed54fbb36b6c2b6d5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and link farm heuristic point towards techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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.
  • 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://trafficel.ru/aws?utm_term=devops+interview+questions+and+answers+for+freshers PDF link annotation
    • https://cdn.sqhk.co/xizubutagen/fifiifI/73166020107.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/jSvdEge/pico_research_question_format.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/X0nJGcl/bridge_builder_adventure_switch_review.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/91d27d9fb.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/jcjeMic/contact_lenses_online_order_uk.pdfIn PDF document text
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/8758061.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/iCic4jj/4528623076.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/9hadgim/strike_fortress_box_mod_apk_new_version.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/hgjgf9y/best_classic_rock_songs_of_all_time_list.pdfIn PDF document text
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/9450064.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/n2nibjg/davuxejodutifojoro.pdfIn PDF document text
    • https://cdn.sqhk.co/xarobumevux/ieWPjdx/second_hand_clothes_stores_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://vatimofaxemog.rf.gd/dojuzerapip.pdfIn PDF document text
    • http://pasazaxara.rf.gd/brain_av_malformation_treatment.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/whatsapp_plus_apk_pure.pdfIn PDF document text
    • http://xupanapil.epizy.com/photo_animator_app.pdfIn PDF document text
    • http://vujofif.epizy.com/29556938839.pdfIn PDF document text
    • http://pamakejexo.epizy.com/editable_certificate_of_appreciation_template_free.pdfIn PDF document text
    • http://wotanuxofewaru.rf.gd/nutivezupuzaxekidemu.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/rodalaku.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 5376 bytes
SHA-256: 62aa8a2b6a6eb8643c20aa996185af6ff495e0b2808e0e9b1214c4de3aba4cb8
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_02_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 10348 bytes
SHA-256: e5e86c47539622506396346733ddd6a51bb0c0c6a3f34be56e0fbff6e3e7e041

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