Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a12c60f2866752f…

MALICIOUS

PDF

74.7 KB Created: 2021-01-05 16:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5b3e582b70cd53d7b9a27526088e39c2 SHA-1: eac75ac6add57305f4c5d2fa97fd6f23c0704234 SHA-256: 7a12c60f2866752fdd296e4e37bd294fb7fe6ce16bde1a6d85f24cc75e325f6b
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=celebrity+big+brother+season+2+episode+13'. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, contains text related to 'Celebrity big brother season 2 episode 13', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=celebrity+big+brother+season+2+episode+13 In PDF document text
    • https://cdn.sqhk.co/fijajiles/wzhc5ja/dirty_grandpa_robert_de_niro_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/mgcicjh/50744281564.pdfIn PDF document text
    • https://dogirewepa.weebly.com/uploads/1/3/1/8/131856222/7901822.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/5zhcPjj/bunny_boots_for_sale_uk.pdfIn PDF document text
    • https://duloduwo.weebly.com/uploads/1/3/4/8/134850843/77997f.pdfIn PDF document text
    • https://jepalojut.weebly.com/uploads/1/3/4/8/134863082/dipogimo.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/5996140.pdfIn PDF document text
    • https://legutuxubumid.weebly.com/uploads/1/3/1/8/131872058/dijogomusaj_zopad_bapuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/V9MgioO/rise_up_lazarus_lyrics_cain.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/fLjitje/kovolesebetuwumozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac8953c-ff39-4ce5-98b7-671889509b17/philips_avent_comfort_manual_breast_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6293b281-c366-42c6-af92-74caa3d1a56c/60274799244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d51158-6474-44a9-8538-c1f1106b5766/wienermobile_driver_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8785e7-0943-4b55-ae26-af45670d94c0/zagotasujodovazepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b2dcca-1123-4cd1-a31e-7a5037aaf860/hacking_electronics_an_illustrated_diy_guide_for_makers_and_hobbyists.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 5716 bytes
SHA-256: 0ab0470737ae775ec89b879bf9b43f41363edbfd8be9686bfb31fce0a05caf11
font_01_sfnt_off0000f74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 11200 bytes
SHA-256: b00826e95ca0adcbfda4de5f1c824fbdb765e7e5f0835409c08f26229af97cb1

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