Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ff434fb96b9e22…

MALICIOUS

PDF

81.8 KB Created: 2021-03-01 22:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8fd76c546fac03cb1ec85a3f41ba2678 SHA-1: 467420ec5dded93f75c7407fefbdb45f28a29a24 SHA-256: e4ff434fb96b9e2211e30ccb06e0ea210f3fb2c16a15bf6ae7a064451dee8884
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting a link farm or a phishing attempt to redirect users to malicious content. The presence of a 'download button' heuristic and the embedded URL pointing to a fake GPS application download further support a phishing or social engineering attack. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/wix?keyword=fake+gps+go+location+pro+apk+download PDF link annotation
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/2bf47643.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/2436572.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/dusined/argumentative_thesis_statement_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/english_long_story_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/mulibe.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/64062629171.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/cut_songs_for_whatsapp_status_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/asthma_predictive_index.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/povetukeze.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/46814170994.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/refresh_listview_in_adapter_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/bartonella_bacilliformis_morfologia.pdfIn PDF document text
    • http://roxadib.epizy.com/chemistry_unit_1_worksheet_6_dimensional_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/basara_heroes_ppsspp_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/expert_apache_cassandra_administration.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 5140 bytes
SHA-256: a096ea9c0d9d8494d5c4e240a390d724266edf3043dc08138be1a4e24893a080
font_01_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 10276 bytes
SHA-256: cd2a05952b26b624178edead790dc881757d1405aa43005b3394aa18ede24503
font_02_sfnt_off00011509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11509 16660 bytes
SHA-256: 6b5fadd2f52bc1ca77e7aa2b1b7aa60fe2d97728aca7f1a06ec49f887284dfb6
font_03_sfnt_off00012b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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