Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be26891e95cdfa3…

MALICIOUS

PDF

87.5 KB Created: 2021-05-27 06:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a4ba0480396b555db2bbe07c990f25ec SHA-1: 5f8c979bb466765643e4561196273bb088895d9e SHA-256: 9be26891e95cdfa308a2f12636ae74dd7827b08c8bc8062cceed98067b4e54dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • 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.
  • 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://golowaki.ru/strik?utm_term=mujer+negra+analisis+interno PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479470/normal_606962cded256.pdfIn PDF document text
    • https://govalusazun.weebly.com/uploads/1/3/5/3/135325024/2841821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_604df0e4e50af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5fe035d118587.pdfIn PDF document text
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/jupijarapazotit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fe53cd2466e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af951acf-e139-4429-bec0-468fb620c763/digital_marketing_plan_example_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6482049f-983a-4631-815f-6d9ad010fa54/td_jakes_books_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ddd75c9-250b-4b07-aa0e-42315eb51ef3/33499963533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726d130c-447a-4a1b-910f-50a49e9f12ac/rikij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e42290-7c67-4425-a8ee-d1b3808d99f9/test_de_inteligencia_emocional_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922e0234-509f-4f87-ab61-55e7d86bcb2d/2477205833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acbcfebd-43ab-4184-bcd2-8eaced88b89d/exec_dbms_stats.gather_table_stats_granularity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe275de-3f6f-4bf7-8897-74b3087f5e3a/72230770317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa98cc3-4e0b-4221-b136-0227654515d4/wezoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c14875e-ec66-472a-a8c7-d33b228d1fca/86430957675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294bcd37-a18b-4198-8c15-fce63f566824/74413652482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0570b011-2148-4ad1-b4f5-690da7b2752c/fluke_177_meter_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f858b9-252d-4a7f-8ae0-22104bffa9ea/18422906105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7946152-5152-4813-9487-306f91f9a7b1/supumele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03ece2c-e559-47bf-b0ab-5390bd1edd68/developmentally_appropriate_curriculum_best_practices_in_early_childhood_education.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_off000116ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AD 4936 bytes
SHA-256: 1485059f0a2647586e588009b0a80157e7ce18031514ed0b2319e99ce0b3d5b7
font_01_sfnt_off00012796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12796 12236 bytes
SHA-256: d25212cb83f844922065a780629c493b65ca644a19c027cc1b343f67f6a4c0e0

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