Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc16b4b3b7934ca…

MALICIOUS

PDF

70.0 KB Created: 2021-02-16 04:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 82c48602c0eb149afd92a2cebf69f525 SHA-1: 581553b324d9b195e48f2213362a5e74c31e723b SHA-256: adc16b4b3b7934ca480a2c514e3e6bb1b74197e4fcd473b2a590fd67bb39f9c8
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/123?utm_term=introduction+to+psychoanalysis+bateman PDF link annotation
    • http://nicechange.space/30358241671qls52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5ffd046a825ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_6007d1bfa7af4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_6019342f3c356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_60167b637360b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5fdefa82efe7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389354/normal_5fee0e65620ac.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/NvwCBhg/hip_hop_old_school_songs_90_s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_6029b271d8288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459777/normal_5ff655b267760.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/nerugiraxura/chernobyl_series_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/85857953232.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/free_1st_grade_english_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/14720165260.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/bolivia_league_standing_table_and_form.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_off0000d490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD490 5492 bytes
SHA-256: 07f836b727a51ad7bf5de9b18e6a2aa7fa8d8efeff3ae86b0ae6caa4fc6b7e5c
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 10596 bytes
SHA-256: dca0e423ddac1f97056492958b682f85f4b0a3185e22ca7f3355f0536c218adc