Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d0b8719db7f64a…

MALICIOUS

PDF

80.2 KB Created: 2020-12-19 22:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4fd32a5d5a6db81f40499335a58d40ad SHA-1: e0eb60dcadca0ef8e7f57aab53df00ea5c2efb40 SHA-256: 80d0b8719db7f64a45dc4eb4d81266705e824c3cdd577601673c8f4df54f2a11
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing a large number of external links, identified as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://traffine.ru/aws?utm_term=android+bitmap+rotate+180', is flagged as unknown reputation and is likely the primary malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or trojan activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/aws?utm_term=android+bitmap+rotate+180 PDF link annotation
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/javap-ledaburus-nutunex.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/komesowi_bututudizilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_5fdc0c0d6dc1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc55556bdb33045eedfa18c/t/5fc767636beae4543165d725/1606903652835/3871246205.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68d0568612547ed851436/t/5fcbc2207ab0f364abb4715c/1607189024249/best_psp_games_to_play_on_ppsspp_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/decile_for_grouped_data_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/akmu_summer_episode_album.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51df7a879396864237156/t/5fd0e09289fd2c07d10ea196/1607524498986/m416_gun_pubg_ringtone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13b47c14dfd36fef3b64a/t/5fc527d61972c46e3c43659f/1606756310877/elkhorn_wisconsin_high_school_mascot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eca2be9b6939510ae43f/t/5fc503465147b14804d079ed/1606746950531/psycology_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7a3b0a190b16b315946c/t/5fdce5b838a54414684aa888/1608312249176/68091175061.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/28243741564.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/naruto_x_boruto_ninja_voltage_apk_mod_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc177dbbf71053ccb142dd9/t/5fcf399b798354522d0b101d/1607416220487/85136812218.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38e39104edf1d7791b9fc/t/5fd063c75efba8153b22ee6a/1607492553186/wetowinapazoxovumepup.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_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 5412 bytes
SHA-256: 716583ddd290f7fa314f2803457ba53b966361d160262b38fc761359d668d21c
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 12952 bytes
SHA-256: 5aa7322c00d304ce633c8287653a3eed5c4056d73932870cefa97ae56a338cdc

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