Malicious PDF — malware analysis report

Static analysis result for SHA-256 addb18c7de127876…

MALICIOUS

PDF

71.9 KB Created: 2021-05-09 14:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4f921ce51774df91f8f8fc99229193e6 SHA-1: 065f1f6ab3126b631f73ad6e09b8dd062269fc9e SHA-256: addb18c7de127876cbae97235d2379e9f38ea0275a3a977b76d3281b475bcfcd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a domain associated with malicious activity. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to contain keywords related to car prices, suggesting a lure for phishing or to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=toyota+camry+2020+xle+price PDF link annotation
    • http://lomidal.mygamesonline.org/funcion_de_los_antiacidos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zajupulavofawi.myartsonline.com/40318110167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71601015-3774-4a86-a4fb-645ce1cb4f48/43262512328.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/hernia_umbilical_en_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/troy_bilt_tb200_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/wusafusoxorevazitopan.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/whats_another_word_for_remove.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/instagram_videos_free_for_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/30158511357.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/a_t_road_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/kawokaniwavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161be65d-c1f4-4382-b91e-3866638d45f7/how_to_replace_toro_snowblower_paddles.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_b0f0326ae94448faad188f1a22820b7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/nice_guidelines_type_2_diabetes_algorithm.pdfIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_24a3bad868e742e098b5baa4d04d9bda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/zebazulotunijajotojuzod.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/complicated_cystitis_idsa_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2a9528-7f32-42f6-8692-8c885b7265d3/rafuvadome.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/13210683214.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/ratio_in_lowest_terms_worksheet.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_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 5296 bytes
SHA-256: de6bccd8813ac88270972781bc89b164edbcb47dbcd74a1224564e59444d6963
font_01_sfnt_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 10668 bytes
SHA-256: 0eabe3d6b155a638e840ba553af2cecdb0ec45895f65fe597a259a68d2c99526

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