Malicious PDF — malware analysis report

Static analysis result for SHA-256 115f161780b6b384…

MALICIOUS

PDF

95.9 KB Created: 2020-12-28 02:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 24361136f851bc6b5e5369105c69bfe1 SHA-1: 784eb4524509d05ade77948baa2bae235e6a05b8 SHA-256: 115f161780b6b38459b490f26b462e666849896a4194fef96cd63c4b2146ce95
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous external links, including one to a link farm, suggests an attempt to lure users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=a+popular+trend+in+military+foodservice+that+offers+alternatives+to+its+personnel+is In PDF document text
    • https://dedodewoluxo.weebly.com/uploads/1/3/4/4/134402612/zusebapivipobatavi.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/jgiemFz/xonesu.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/XFijyiC/carx_drift_racing_mod_apk_old_version.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/2557848.pdfIn PDF document text
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/petuwekobiparowoxadu.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/vuzufexarevima/ledumudakovib.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/wuzera.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/26814416416.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/61377943303.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/migufadupavajigorimififup.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/capitaland_retail_china_trust_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/android_auto_4._5_developer_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/mutilate_a_doll_2_download_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/54985814705.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_off000138f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 5548 bytes
SHA-256: 727045c496ed389df9a0b3a7542138cf599f9d60967fc53e4317c2024955222e
font_01_sfnt_off00014bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BBD 11412 bytes
SHA-256: 594a4e1caa2e2cb9078435d1ad65cae37052af8655fcae91e01f86039f9eaf8b

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