Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f442d6c721df6c9…

MALICIOUS

PDF

96.2 KB Created: 2021-03-10 08:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8305e5603f8a64a41dacd0061d88664e SHA-1: 725d417bb41376a98ae5456ce485fec8e3c4507c SHA-256: 9f442d6c721df6c9bb34afac01477e27e6008fc53ce540de5c19f976dc0a32c5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://yafferge.ru/123?utm_term=anticonvulsivantes+efeitos+colaterais+pdf In PDF document text
    • https://cdn.sqhk.co/benibavagoge/Qxggtid/rixipazosofipe.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/tjfx7ii/vocabulary_builder_app_for_adults.pdfIn PDF document text
    • https://lomobesozav.weebly.com/uploads/1/3/0/7/130774973/sitajewotasufaniv.pdfIn PDF document text
    • https://cdn.sqhk.co/mesojofu/iTghhhe/free_wifi_calling_and_texting.pdfIn PDF document text
    • https://nibadaxolakawub.weebly.com/uploads/1/3/4/8/134882114/fexodakume.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/dhgijhh/majesty_northern_expansion_apk_1._5._25_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/qUMhbge/duserolawowelemolewoki.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/74c043db-ee67-4a7e-87d9-df42ecb59d1e/tawuxifus.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/ponuwutapenifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74439916-b72d-42fc-831a-3b3cfede3319/ge_front_load_washer_tub_bearing_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/scientific_reports_impact_factor_trend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fd5bd8-5893-437a-b04d-a04f12dde9c7/15150812347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f75f294-fa75-4c94-be89-b845068041fe/dometic_penguin_a_c_shroud.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/patjhad_saawan_basant_bahar_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/online_answer_sheet_checking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ce0b4a-19b3-49fa-bc88-13a1881870e2/a_streetcar_named_desire_act_1_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/mathematical_model_of_dc_motor.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_off00013d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D55 5196 bytes
SHA-256: 083cb902e53e36c19d2cbb35b5e8dbd3a0e1f3fb1bb6019bb0ab3bb4cbcacead
font_01_sfnt_off00014f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1E 10656 bytes
SHA-256: 42479c9eb0b9dbea28643c36062971f437ad3444265a50696e50a618a1e03b35

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