Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb19bc6a860d1eac…

MALICIOUS

PDF

101.1 KB Created: 2021-03-03 04:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8dc9cf2b8bfd5f9e1a71c1d0004c7af2 SHA-1: 509378695c5ea6bb3b9d7f18e14bcefa94d2f237 SHA-256: cb19bc6a860d1eaca107bf58616e0401fc4f9f908e982eee2a6bbce5f0f560be
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure, disguised as a worksheet. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/wix?keyword=characteristics+of+graphs+mystery+code+activity+worksheet+answers PDF link annotation
    • http://kegujusotuk.iblogger.org/creative_brief_template_advertising.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/vepupov.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/ithj5hc/78438818135.pdfIn PDF document text
    • http://bijivarudigodig.iblogger.org/38136528071.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/62532005089.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/dejadabadetu.pdfIn PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/Bgfjdhd/lilog.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/7154550961.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/xirixepo/wezujadubob.pdfIn PDF document text
    • http://ginokiximoz.rf.gd/80304158121.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/fosojako.pdfIn PDF document text
    • http://duvodix.myartsonline.com/vevakapuroveritebuxetuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/wibuweresonexoru.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/84558018318.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/why_does_my_hp_wireless_keyboard_stop_working.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/harvard_reference_style_word_2010.pdfIn PDF document text
    • http://mowobamalopun.epizy.com/retirement_resignation_letter_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/30034901255.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 7000 bytes
SHA-256: 31fb927a365da626fc1525ccd1d5164c31c30c8f5477befed2477ad21dbdb5d3
font_01_sfnt_off000110d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D1 3868 bytes
SHA-256: 1c34c95e8e665c82692c7607900aa63d232a578c87b55e98e44dc4bf57d66522
font_02_sfnt_off00011e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E90 5668 bytes
SHA-256: 37baca7dcfbd72b2cf7910dc3c4822194daa4a6d737ed54a7a7981e6825718e3
font_03_sfnt_off000131cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CF 13056 bytes
SHA-256: c4caa7214dc07719f9525db3c8ae6dc480a702b1fdb6c6519893b3a7e83ce6cf
font_04_sfnt_off00015e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E3D 16528 bytes
SHA-256: eaf5d81706c65c9f86dbbc5e8aed4ab075d38eddaac62222ccf9f3cd03ce5e7f
font_05_sfnt_off000174c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174C2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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