Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63d73c7bfc1b5b6…

MALICIOUS

PDF

80.3 KB Created: 2021-05-15 23:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 89db0320e5a074b60d0206086b0736f6 SHA-1: c9260689f57d121bcdd698d5cf7e2765f5c47a29 SHA-256: d63d73c7bfc1b5b62f063e09f06800daf5389fa784a78d5b3490c95964985907
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=top+5+interesting+books+to+read PDF link annotation
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/cc4bd2dafd17.pdfIn PDF document text
    • https://vonosupaxeme.weebly.com/uploads/1/3/0/7/130740497/dudake.pdfIn PDF document text
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/divop.pdfIn PDF document text
    • https://gesojotumone.weebly.com/uploads/1/3/4/6/134614539/da2a36.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/rejiner/wavova.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/visenapu.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/asep_systems_engineering_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/bulejoxog.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/99623221969.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/intermediate_algebra_problems_with_solutions.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_dec2a05805ab42bcaef697cb1fe0e72f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetevali/criminal_psychology_beginner_s_guide.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_ab72288911a54556a3116522258970d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusixa/navesavufusexugiluresusu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/5280824728.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_39c7aad03cac4e33b2ff9d80d644acbc.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 5160 bytes
SHA-256: 3c5272492e47d1cf7d6060185c7737b2696ed09c1d08b8c7a9f5c8414c87992c
font_01_sfnt_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 11052 bytes
SHA-256: 1ebc98da0e942735b77af872e5f957baad16a1353c0d9ec15975e142dcf61077
font_02_sfnt_off000124c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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