Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b86b8cefaf39f8…

MALICIOUS

PDF

83.9 KB Created: 2021-03-23 08:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 10135b49e536eb6ab8fc11d2340eac27 SHA-1: a99a33820e7e4d722be03e00511db03721895af5 SHA-256: 06b86b8cefaf39f84ea6173f54fea0e018d9399dd860a3fbfaa95d634edef147
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, directing users to various websites, including one with a suspicious URL related to 'cerebral palsy physical therapy'. ClamAV and an ML classifier also flagged this PDF as malicious, specifically as a 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to drive traffic to potentially malicious or deceptive content, aligning with phishing or SEO-based malicious schemes.

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://druttle.ru/award?keyword=cerebral+palsy+physical+therapy+pdf PDF link annotation
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/e0b6341c15f.pdfIn PDF document text
    • https://gepumisi.weebly.com/uploads/1/3/4/5/134517510/22c7ad93617a0.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/dudapibusarajelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tizowodifi/evaluating_piecewise_functions_worksheet_with_answers.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_cdb48047d66e42c2ad2471308e81e36e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab9e7eb-08a4-455c-a96c-af03cfeb2bd0/how_to_use_bowflex_xtreme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc09f7be-7519-43c1-9bed-f66a78b58ffa/the_5_love_languages_of_children.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/90913367284.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/xuruxezodaluwowunokubow.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/climate_change_in_australia_cluster_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/78588744292.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/new_video_songs_tamil_2019.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_489ddc7daa0d4145a70866d48b5ecdbe.pdf?index=trueIn PDF document text
    • http://xifimerin.onlinewebshop.net/31180029365.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/is_it_ok_for_guys_to_use_emojis.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_0e2d579cbbf14966b9f2aad49648aabe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuzakob/last_day_on_earth_survival_guide_aluminum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 5080 bytes
SHA-256: 9b28db50163037b568334f0835cb75541cb3dd1d53a19b87fa80f9251111f0c8
font_01_sfnt_off000110f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F0 10388 bytes
SHA-256: 7790525b62f40e3044a038929e94aa4e93663d4d116c382044e94272c8b9f5a6
font_02_sfnt_off00013488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13488 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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