Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6414fd33dfbf8a…

MALICIOUS

PDF

68.6 KB Created: 2021-02-21 11:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b0a50eafc24e08cf8b1393c8efd906b2 SHA-1: 5f44f51cf6cc1e3622009d1e14d05aff1530f21f SHA-256: da6414fd33dfbf8aa71671db4ef8725b81389f4a334ce64ad6a6229750176daf
196 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
  • 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.
  • 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.
  • 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://maypoin.ru/wb?keyword=is%20cool%20mist%20humidifier%20good%20for%20congestion PDF link annotation
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/7ccf1060.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/90e1e.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/nufasofopilam_kanot_foxafu_tefubi.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/560f83f.pdfIn PDF document text
    • http://cashthe.ru/7245230811760fmn.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/DhfHhWY/brutal_math_teacher_super_duper_ultra_fast_module.pdfIn PDF document text
    • https://zabojipenow.weebly.com/uploads/1/3/1/6/131636987/roradaxutoloz-totazalade-jijimodamatalak-toniru.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/bulikowexunepov/bodo_song_2018_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/69825556778.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/san_diego_regional_bmp_design_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/adzan_merdu_mudah_ditiru.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/cara_story_whatsapp_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/moh_moh_ke_dhaage_raagtune.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/tesco_email_address_format_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/devof.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_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 5160 bytes
SHA-256: fd67224bcc43c948f2364e102172efeaf211ecd8dc89de7675dd8028e1ae4bd6
font_01_sfnt_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 10484 bytes
SHA-256: de6e64cddb3f2920a122ac5c8f2f44219805ccab24fe6fbfb5fcf279190f0d99