Malicious PDF — malware analysis report

Static analysis result for SHA-256 317b1105999932c2…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 22:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72baddeab9c0c889c20b0ff257292c08 SHA-1: 70c284dbe5865b9cc148c0bb54cc40e30d4b9bc9 SHA-256: 317b1105999932c2d9bf354fcc53f63058f607b3c1b223eaa9bfe39b868cf795
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a website that offers 'free paid apk download', indicating a lure for potentially malicious software or phishing. No scripts were extracted, but the presence of the malicious URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=free+paid+apk+download+website
    • http://gnfcns.info/sifonatenii7l01.pdf
    • http://ladunosim.sportsontheweb.net/english_grammar_workbook.pdf
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/5d67b95087a754.pdf
    • http://womizepivilora.sportsontheweb.net/52188142568.pdf
    • http://wonnaturila.space/fakitutugupaxos20tk.pdf
    • https://cdn.sqhk.co/lilokimoz/emIgfpk/casio_fx-_5800p_manual.pdf
    • https://cdn.sqhk.co/kavejufa/icieHfy/oneplus_switch_stuck_at_0.pdf
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/suradusubaxax-gilisoje.pdf
    • http://whitecheat.xyz/tureguze7pp6l.pdf
    • http://reassurez-moi-fr.info/xirozefinelagejebusrhpiy.pdf
    • https://tutonaxubetu.weebly.com/uploads/1/3/5/2/135296536/8916160.pdf
    • http://wide-do.top/pl_sql_to_date_format_mask7b8lb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tisavan.onlinewebshop.net/comment_fusionner_plusieurs_fichiers_gratuitement.pdf
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_9952a82f85db40f89c3f6b5e298fe8f3.pdf?index=true
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_2bd13edf28c94382a21c4350452fdfad.pdf?index=true
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_60914e29074d436784a7a116fa465031.pdf?index=true
    • https://s3.amazonaws.com/lodazojamuva/avatar_the_last_airbender_ds_game.pdf
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_836d291bce964806bbe630397f9ca6b4.pdf?index=true
    • https://s3.amazonaws.com/sajezife/42652710769.pdf
    • http://vizomonuzujo.onlinewebshop.net/emp_jammer_circuit_diagram.pdf
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_3e49b8851be5451eb38555147f749e5f.pdf?index=true
    • https://s3.amazonaws.com/figidireki/28613727694.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_off0000f73b.bin
448d5202b0bba83b82e102d3d7c5a7e97e5d31716c7ee4423306a1bd96d0c9a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 5204 bytes
font_01_sfnt_off00010908.bin
d97a87d0e37ce7ba118662bf2195f87e0bd5665edb53cb1aba77cf55dbb0e588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 10512 bytes

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