Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12cc26724c82e45…

MALICIOUS

PDF

73.6 KB Created: 2021-02-03 19:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: feab30dc19ce5e3fcdd641aab7ea3f2f SHA-1: 92ff587ffb08eae34c6f303d95aaac2c6a628bd4 SHA-256: b12cc26724c82e45b2cdce76c7cfe02848110924f75e5867bc665d37a4482b30
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to suspicious domains, suggesting it is used to redirect users to malicious content or phishing sites. The presence of PDF-specific heuristics and embedded URLs points towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=cedar+picnic+table PDF link annotation
    • http://jelolizabuvixi.22web.org/numbers_in_spanish_1-_1000.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/ggfUhaX/vobufiludututibejewelufed.pdfIn PDF document text
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/torezeserafasobi.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/fB6Zigq/slicer_3d_printing_cura.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/sefekomejuwekiz_sazisewugipox.pdfIn PDF document text
    • https://dimegowogox.weebly.com/uploads/1/3/3/9/133999821/4854824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fdbecb32e486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495037/normal_5fdc44e8b438e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_600daf472f693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fffdc91e7ac0.pdfIn PDF document text
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/mijuvasul-tamesozuvu-loralobewa.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/gdojaAP/homestead_land_for_sale_in_tennessee.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/xilasisefi/lewis.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/dfe_benchmarking_report_card_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/guided_imagery_exercises.pdfIn PDF document text
    • http://ritarejameja.epizy.com/dubimisixawibamosiz.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/casavant_performance_organ.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/sanupexukurulu.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_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 4936 bytes
SHA-256: 6e62aff5afc066ab62624f487f9d07de68c094eb16753a42730fddfaba71e0b1
font_01_sfnt_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 10436 bytes
SHA-256: 0c2e8f4acf2892e768c406511d25dd5128b79c3684e529f9b38d52a34495d7f7

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