Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd96a2aae6e5cc3…

MALICIOUS

PDF

74.5 KB Created: 2021-01-27 11:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 16a1868a63da8fa7704f62b75552ad8b SHA-1: 9032d8a1e5aecc8719b8da93f215f7404758510d SHA-256: abd96a2aae6e5cc329b2e52dc79dcbcfe86423af918cd06593c30cec14704fa0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or a phishing lure. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a phishing attempt designed to redirect users to malicious content.

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://jottigo.ru/123?utm_term=passport+to+success+program PDF link annotation
    • http://vejawezodasupax.22web.org/gmail_signature_templates_free.pdfIn PDF document text
    • https://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/6385492.pdfIn PDF document text
    • http://biomaniks.website/42836682122s7tjo.pdfIn PDF document text
    • https://kawifapexevudo.weebly.com/uploads/1/3/4/7/134711131/wakokibijo.pdfIn PDF document text
    • http://rating-bookmaker.ru/29864198771p641w.pdfIn PDF document text
    • http://hookup750.website/the_walking_dead_michonne_episode_2_download_android4zs5l.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/6939624.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/pathfinder_kingmaker_romance_octavia_guide.pdfIn PDF document text
    • http://topstudy.fun/rodotuzezek9bpr.pdfIn PDF document text
    • http://esmoney.site/magic_magic_video_editor_pro_apk_modfnlwr.pdfIn PDF document text
    • http://trokot-newshop.online/hungry_shark_evolution_hack_download_apkj8foa.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/xotomisen/9934310112.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/91879876255.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/bhu_b._sc_agriculture_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/87552077276.pdfIn PDF document text
    • http://tafujeloraxofo.epizy.com/simple_invoice_template_free_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/cambridge_c1_sample_test.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_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 5220 bytes
SHA-256: 55368fd35e3b7c3fb0627d06454b508d09f6d22928309e66206efe9b237e4025
font_01_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 10436 bytes
SHA-256: 1fac18e2b692c35127970bef799042014f5d1f1cbf843953e0c728232ec0098f

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