Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5f742ab0e5bc1f…

MALICIOUS

PDF

93.9 KB Created: 2021-02-24 21:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a2aaaeb4aebd5a8bd44ed0afe3cc4803 SHA-1: 5975dc89cf9cfa9b802901e40acdaa2980d75b5a SHA-256: fb5f742ab0e5bc1f12f03993abee25ef066899ef3350edd4e4a843e1d6f2fbe3
154 Risk Score

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 0.9997

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=how+to+write+a+research+proposal+apa+6th+edition In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fff439fa31fd.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/Qig2mjb/western_music_hd_wallpaper_download_for_mobile.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/node_js_referenceerror_document_is_not_defined.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/Uhajfjh/65658377666.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/ihXs5Tm/limeduxunepewes.pdfIn PDF document text
    • https://cdn.sqhk.co/fujigugi/ggid8Bx/10587863550.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/rF5hhhf/hockey_goalie_skates_vs_regular_skates.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/nuptial_knot_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/aoc7g7K/84517662863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/56150856055.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/msc_bellissima_formal_nights.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/airport_utility_application_android.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/how_to_use_a_rice_cooker_zojirushi.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/ruzafulibubixun.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_off0001334b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334B 5368 bytes
SHA-256: 7dbd9f053d5a814772505981b147b4d7577831d9df79c7ed089b0ff99058d630
font_01_sfnt_off00014596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14596 10804 bytes
SHA-256: 20ac40d655463e9ff0e30d392e0a4650687e45b82c596afcc3dc5277c3ab76a0