Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5aaec90eeefad1b…

MALICIOUS

PDF

68.7 KB Created: 2020-12-22 19:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 233340835cd1fbb15541746736015377 SHA-1: 9f039387b0fcff15dd30d04c1e6ac13f02f2e932 SHA-256: d5aaec90eeefad1bc66cdaea38db4b3416e85df2a1211190031ae9f392e0e053
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 0.9997

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://traffset.ru/123?utm_term=ans+meetings+2020 PDF link annotation
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/pijepa.pdfIn PDF document text
    • https://lewutiresapilo.weebly.com/uploads/1/3/4/5/134594640/9d8ec53865.pdfIn PDF document text
    • https://vadazexo.weebly.com/uploads/1/3/4/6/134646317/e2323a6e2.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/remavuj/kilexojoxabuni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17eeec89e1c4b8fc2a697/t/5fd1df6ec10336458b38ed39/1607589748706/marxism_leninism_vs_democratic_socialism.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/words_starting_with_did.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/comparing_decimals_word_problems_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc297918139af03764ff7e8/t/5fc570581972c46e3c569b8b/1606774878702/dark_souls_2_flynns_ring_vs_ring_of_blades.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9da7ff99f865bfec24a0/t/5fdca7436542785c7ec9386d/1608296260042/faxisawetasulogikojexi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/ball_bearing_sizes_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/60339449407.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DC 4928 bytes
SHA-256: 0e73e6002b5d836e70714037f03e2a69413fb6430df2a24ad8ebbb14f38cf3d9
font_01_sfnt_off0000d797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD797 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 10468 bytes
SHA-256: 42a1e3cd6edd37e7f3d7794c93365d62f22d95bbc9bb808fe93aa5e3975e7410

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