Malicious PDF — malware analysis report

Static analysis result for SHA-256 774d19663d358c1d…

MALICIOUS

PDF

73.1 KB Created: 2021-03-24 01:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17e612d2bf3120b3652a71ec9499a158 SHA-1: dfe1bd5da354fe466b0f94fad20bc004cd1764d5 SHA-256: 774d19663d358c1dbd8a28cd61d00cf36cc68d9ab0addd62271f701ab618277e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=biochemistry+test+list+pdf
    • https://jumekurokenawuw.weebly.com/uploads/1/3/0/7/130739991/disepapojusik-bupakewapup.pdf
    • http://tujukesabegakom.mygamesonline.org/7252740214.pdf
    • https://borobufa.weebly.com/uploads/1/3/1/4/131406827/5585490.pdf
    • http://zizodoroluxonaf.sportsontheweb.net/likigizobebajuwikafijafu.pdf
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/4365489.pdf
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/b741f8.pdf
    • http://tebapewulodafe.getenjoyment.net/hp_elitebook_folio_9470m_i7_price_in_india.pdf
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/babavudulori.pdf
    • https://pezofonarumupub.weebly.com/uploads/1/3/5/3/135396673/nizepowefunufimoxa.pdf
    • http://mixezitubut.mygamesonline.org/why_do_i_have_sound_but_no_picture_on_my_apple_tv.pdf
    • http://basagutidabe.sportsontheweb.net/35567178027.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tefetuzuzip.myartsonline.com/funcionamiento_del_cerebro_humano.pdf
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_2b13bb23e8404deebf72c15b433d7412.pdf?index=true
    • http://rixibedi.onlinewebshop.net/robotic_process_automation_tools.pdf
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_96d8fe408cab490e8793bad96d382ca1.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_ef43bd1431f44ceab35d6f4478c11cb8.pdf?index=true
    • http://rexefobixavater.myartsonline.com/56460056682.pdf
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_2665e8b844654216b05b9e4b46c6391b.pdf?index=true
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_fdeb9d816cd54a33b29fe7c9678f03cb.pdf?index=true
    • 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_off0000e0c7.bin
0188918b7ea61a888c136427c3360ad15f1971706a4e634a320cf3d57421f5f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C7 5336 bytes
font_01_sfnt_off0000f2d1.bin
499f18a11c017213e870019019a481b5d0a3e44691b23654154f513df9cd8623		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.