Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c47fa8ffe6e6b6…

MALICIOUS

PDF

96.1 KB Created: 2021-03-23 14:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fd33df7949c61c5a8b862effdd5ad799 SHA-1: 08b8a0cc4751f7bb1696b0c2ae2496f91225b6ad SHA-256: 65c47fa8ffe6e6b618fb047776939ab087ea1b54622192ecc1e01b1c03aee56a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a phishing or scam attempt related to a search query. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=parliamentary+system+of+government+in+nigeria+pdf PDF link annotation
    • http://nubolutlion.xyz/vekexadipegusesafa4ert.pdfIn PDF document text
    • http://dream-stat.ru/epson_perfection_v370_photo_flatbed_scannerkidd1.pdfIn PDF document text
    • http://tevfikyuce.xyz/wedding_cake_toppers_for_sale_pretoriatyrnm.pdfIn PDF document text
    • http://winwites.space/nazudifomonifelrmwp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_604158bf09ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489850/normal_5fe92c7d32ac5.pdfIn PDF document text
    • http://dithetsen.xyz/how_to_learn_probability_mathd4e5k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498882/normal_603a855b0e2c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/google_spreadsheet_right_to_left_sheet.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_6268dac69b754ecfb10e4aaa3b8e8662.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzujewa/liquitex_acrylic_color_map_mixing_guide.pdfIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_79fe9c6429c340d890cad414a627d827.pdf?index=trueIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_20e93c531e9841769bd3be3989bb052f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/61532932683.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/how_to_turn_off_security_indicator_light_subaru_crosstrek.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_off000138df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DF 5524 bytes
SHA-256: 9c89595cce31495efe090c3806ae43f0372d54868cf15cabb4b328033bc9b469
font_01_sfnt_off00014ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA4 11632 bytes
SHA-256: e88d19f504c75891f663bf6cd7c4360692bb85563a163ac90c4dfb2ae83ab98d

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