Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89f17634427f462…

MALICIOUS

PDF

81.1 KB Created: 2021-04-01 22:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ae9a41e46dd59c22efb5b80b6ffb293 SHA-1: 7b863b12098839b9e651e8ac473ed50d33ec1b59 SHA-256: c89f17634427f462b285fee542f67d31b2c65264489f76a46a4735143c0105c3
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://baarspo.ru/123?utm_term=ailet+2019+answer+key PDF link annotation
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/nexumasinolobif.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/5c59e.pdfIn PDF document text
    • https://pavadugubuwab.weebly.com/uploads/1/3/4/3/134309483/d9030.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/60570760203umcyb.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/2311028.pdfIn PDF document text
    • http://vizionsmc.net/30016412956pa32m.pdfIn PDF document text
    • http://wide-take.top/starbucks_barista_espresso_machine_instruction_manuale4mhk.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/3132883.pdfIn PDF document text
    • http://alkostore.xyz/62076603639y09bj.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/Dhh26eH/49800615172.pdfIn PDF document text
    • https://cdn.sqhk.co/tijaxasazuwi/hJgh0mO/35749779410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d8eb9b-017e-4fa3-87e8-d21bf4c733fe/remnant_synonyms_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/36331657367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac8b12e-94e4-4804-9fbc-991a51b7e07f/woxirafizibonibekiboka.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/elephant_hawk_moth_caterpillar_green_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/hildegard_of_bingen_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/attachment_theory_and_trauma_informed_care.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/fasegovoxikiwiperobag.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/rcog_guidelines_on_multiple_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/android_alarmmanager_delete_all_alarms.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/42747975282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c8e221-36d5-462e-be43-d25b8657a751/6586673651.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/4th_grade_math_test_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c06b93b-42aa-47d7-8730-adb94405da4d/hermle_clock_movement_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff2ff1b-5315-49ce-b360-4ead206b897a/walmart_pharmacy_contact_number_near_me.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_off0000ee25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE25 5408 bytes
SHA-256: 4ea77dbc55db8b22e9b15179244529682d016a7250d182fbbc2f98504a6fd021
font_01_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 11100 bytes
SHA-256: ad352874988ce274f1485e44a3c9dc5a473a9da934dc18deb9b31ba2e0f54fe9
font_02_sfnt_off000126ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BA 3836 bytes
SHA-256: fcab0d5e6d967085b40427698aff4df3a93f4937df7c5ebce5a5cb2e95b00b5d