Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc05508e6e601ad5…

MALICIOUS

PDF

77.0 KB Created: 2021-03-27 23:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 056daa4fa3b785f7a6a4b54319117229 SHA-1: e9205d020c8160011cedeb30d63fb6de45410c8a SHA-256: fc05508e6e601ad5bf11c6cfa4da490cb5dc51aa0d1a76dadd7a0af6a0ce2e6b
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The presence of an external URI pointing to 'jumiwimov.ru' and a heuristic indicating a visual download button suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the nature of the detected threat imply an attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/award?keyword=quiero+un+cambio+bernardo+stamateas+pdf+gratis
    • http://falorilipeb.mywebcommunity.org/alphabet_francais_majuscule_et_minuscule__imprimer.pdf
    • http://nelodagavezes.mygamesonline.org/zadilime.pdf
    • http://dogalijun.scienceontheweb.net/68396605746.pdf
    • http://rofogukiluvupu.mygamesonline.org/apx_8000.pdf
    • http://tafakiduwav.scienceontheweb.net/244443295.pdf
    • https://static.s123-cdn-static.com/uploads/4458625/normal_5ffd9b2d74fc2.pdf
    • http://gedadekenoz.mywebcommunity.org/15531535294.pdf
    • http://wusodopepufex.66ghz.com/genut.pdf
    • http://kejumazinanu.mywebcommunity.org/prefix_and_suffix_worksheet_for_class_4.pdf
    • http://dimoguzix.iblogger.org/75274762956.pdf
    • http://xaredazisom.mywebcommunity.org/bixuxitofawomarok.pdf
    • http://bokazisenu.22web.org/california_notary_acknowledgement_form_word.pdf
    • https://cdn-cms.f-static.net/uploads/4413983/normal_60501242a91f7.pdf
    • http://topukovatawosu.sportsontheweb.net/tilidutedalaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jogisav.epizy.com/lubituw.pdf
    • http://jufulejilola.epizy.com/dirt_devil_easy_lite_cyclonic_user_manual.pdf
    • http://gijuvaginitawaz.epizy.com/posiremuvutigimutomeneboj.pdf
    • http://sabukizazuse.epizy.com/brother_mfc_7340_driver_for_windows_10_64_bit.pdf
    • http://vameberimonon.onlinewebshop.net/input_type_file_accept_only.pdf
    • http://bidadaweba.epizy.com/app_china_iphone.pdf
    • http://vekejuf.atwebpages.com/23198612158.pdf
    • http://sapidobilebag.epizy.com/buzenarufidejese.pdf
    • http://potefedezazox.rf.gd/61153623908.pdf
    • http://zagupijalixi.myartsonline.com/maths_algebra_puzzles.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7a.bin
947933b1551c709f8a8e95d351c914e4532fdd468494c9abcbe970a02f437441		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 5644 bytes
font_01_sfnt_off0000fe96.bin
ba69a8bd1c10cd2b128217768edb19ca87b8f5d4ecc4d96a20b3b58320a37330		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 12680 bytes

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