Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bfffd34e3d2c14…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 05:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b30009623a41fcf4f86f8f8f1aaf36a6 SHA-1: 610d97d83a3fc1ce060a0572f6e01fe1afd83f09 SHA-256: b5bfffd34e3d2c14de7164d7069b020ed232a0b883cff26ae40d249570aa2720
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/aws?utm_term=fraction+word+problems+with+answer+key PDF link annotation
    • https://cdn.sqhk.co/xafemepino/lghghJU/28190741210.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/gghijaL/wumetokegug.pdfIn PDF document text
    • http://storedubai.shop/crossroads_inn_campaign_guideuuov8.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/jggggco/77920826583.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/eia0ihg/warby_parker_reviews_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/nigalasiline/csgeghh/18850737529.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/vJihjeh/mapusifepopusigudud.pdfIn PDF document text
    • http://white-x.fun/ice_cream_sandwich_nutrition_sugar73o0u.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/iieM81H/worship_songs_chords_ukulele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374980/normal_6001182f58167.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/VlejjCQ/five_nights_at_freddy_s_ar_special_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwajavi/ajb8Jnp/multicraft_build_and_mine_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/756ZFH2/29151692838.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/f1hRdpb/21642475049.pdfIn PDF document text
    • http://vuvuga.xyz/breast_cancer._csvhhoso.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzabajixiw/6icQhc9/rolling_stones_lady_gaga_gimme_shelter_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/3bIsdAc/how_to_clean_road_paint_off_your_car.pdfIn PDF document text
    • http://domensita.fun/23249156945di4ch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD72 5664 bytes
SHA-256: 9a28e6f7726cce41aff996511162515642105be8956825ba2c0679e5995cd9bd
font_01_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 10256 bytes
SHA-256: 773e5053392e0256479780c1bae113443cb1c343a1c0bd333afb9058c4fe6460

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