Malicious PDF — malware analysis report

Static analysis result for SHA-256 0367c10b20c21608…

MALICIOUS

PDF

53.2 KB Created: 2020-10-29 19:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: df93911de606dac8f9e5c3fc528957ad SHA-1: d710f8c2d17f4f8cbe1e618b8ebfa4a890613a1f SHA-256: 0367c10b20c21608d1e31739311f9378efec6cd5044b6d90b0ed4d07dec32a2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=eso+superb+glyph+of+health In PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/puxitatibufejeza.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/wonoti/gununeko.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/manual_arts_high_school_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/verbal_logical_reasoning_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4863/9897/files/swissmar_fondue_set_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/wireless_display_android_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/50085451270.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/javuzamekutira.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/lazajeburizefuk.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/advanced_english_grammar_class_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/525312966.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/87505532729.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/ironman_envision_treadmill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/architecture_of_8086_microprocessor.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/radial_engine_solidworks.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sindrome_de_cordon_umbilical_corto.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_off00007df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF5 5088 bytes
SHA-256: 12495fbc274e2318978d1e2ea945742e4569a0a8c10d4c490121b283c3b355be
font_01_sfnt_off00008f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6C 12984 bytes
SHA-256: 298e8601c762a30890d6c85086e2061a4df4ba2f12cb591c0fa7bd663ac34d5a
font_02_sfnt_off0000b94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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