Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0142bde0f0931cf…

MALICIOUS

PDF

91.6 KB Created: 2021-05-19 12:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7d96be602e4b14bbd7d906cc68a064b9 SHA-1: 7b0acf35a0a09716c51e5427f65f4821a911ac4a SHA-256: b0142bde0f0931cf4a28c7bf4e79ac39b67bc135251020a516d5da2e36e543d9
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in link farms to obscure malicious URLs and evade detection. The ClamAV detection and ML classifier strongly indicate maliciousness, likely a phishing or trojan delivery mechanism. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to malicious content, potentially for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=ts+panchayat+secretary+syllabus+in+telugu+pdf+download PDF link annotation
    • https://jipunone.weebly.com/uploads/1/3/5/3/135349916/xugazukap.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/jodagepaluwedasofoge.pdfIn PDF document text
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/biloboforujodarude.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/vufuporobu.pdfIn PDF document text
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/bepetisofir-widoxozisipuvuz-xinomawipake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/291c1814-4594-452a-98b3-3d85391f0880/goddaughter_quotes_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/59032181615.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/nenib.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/50373101818.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/96806302717.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/8294947733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd11433-2043-4576-8004-654dd626bcc4/20344531552.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/77414076474.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/bojipujotiriluful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f08e3a4-00b9-4b0c-9cd2-bcbe581c2ef6/nemimijanuburisesanona.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/lemofadoto.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/6506826108.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/charlie_wallace_guitar_mastery_method_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bbd07d-8ff2-4aa4-83f7-48b5dca79e05/57315725914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495288d2-7ee5-46d1-adad-f4e49c41ecec/what_is_high_concept_commercial_fiction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c2f66d-fd22-4e0b-a5bb-71d314965d5d/61561362995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb31819-9087-4d40-94d0-6497e7271f4f/derogewinugegu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/vaxenidesa.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/alice_3_game_tutorial.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 5700 bytes
SHA-256: 49472ea58e2a89a1570b5865910f6375e8fd0a37c3fa17d97535d8de0f4365cf
font_01_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0001184d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184D 11584 bytes
SHA-256: eef975e93ef9c51fc5b56c1c50cc973a1a8aaf7a27774cbf52b48e274deff0fe
font_03_sfnt_off00013f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3C 10184 bytes
SHA-256: 98630ef7fd377526badbc40c5f5de04f0911c7325716cefd49e109605579deb7

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