Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30534b97b70eda9…

MALICIOUS

PDF

75.8 KB Created: 2021-01-14 17:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6485832bb776689841e7908f677af3f2 SHA-1: df15491dcdfca35a515047dbf7e57ede54713fce SHA-256: a30534b97b70eda9d7f0f13676b923b17e2914b4ccccf7934717e1fd6b9b019e
156 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a common product, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF contains numerous external links, likely for SEO manipulation or to distribute malicious content. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, possibly involving embedded JavaScript for exploitation.

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://trafficel.ru/123?utm_term=heel+pads+for+shoes+that+rub PDF link annotation
    • https://cdn.sqhk.co/getabemuto/hiqlqhd/wifekapaludivude.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/wibidixe_nowigaseraj_boledopepivesuf_winoze.pdfIn PDF document text
    • https://site-1166728.mozfiles.com/files/1166728/hockey_monkey_denver_colorado.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/d654b745.pdfIn PDF document text
    • https://site-1178142.mozfiles.com/files/1178142/29008811552.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/mhfieic/govipomif.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/4kD8ZQV/bimogujik.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/1853165.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/zafijukopa/math_shapes_for_kindergarten_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/32353811137.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/918635822.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/37019518546.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/guide_michelin_alsace_2017.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_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 5228 bytes
SHA-256: 69e1101870113091fcc45e29ccf7ad057158494de86acd36b6e6fe72282adcd4
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10612 bytes
SHA-256: 8b5f9f0c42669fa798a59836b27cbb3439856815b41b79d3a3b7df0077ea03fa

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