Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc671e8a6419757f…

MALICIOUS

PDF

72.1 KB Created: 2021-02-25 18:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fafd7d9cbe2ad67ca5c7f0621d424793 SHA-1: 392e3afea3c6d372f421c92e5b393a23bee41f3f SHA-256: dc671e8a6419757ff1b4e2166ead77dc6d23573501a72d3a22adee3eb5a7b670
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/award?keyword=walmart+grocery+add+to+order+not+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486033/normal_5fd93b0cb040b.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/OGibjcx/wifasukagawotu.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/r6ifsha/20627425567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_6018cbbd9dabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_600e905cc8170.pdfIn PDF document text
    • http://redirunna.xyz/top_paid_android_apps_kickass_2018kn5l5.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/Pgg8Zha/1645712023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_602b946391d9f.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/44087025939.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/kepaziboja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_5fe13863a76ac.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/fovaN6q/fatuwejugokeweje.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/fekife/anaconda_3_for_windows_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/insert_data_sqlite_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/mugon.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_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 5352 bytes
SHA-256: 9406f42cd03f6e3c96e74fbadb21ffa3be5462b65936ae1185825ac4973850c8
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 10552 bytes
SHA-256: 005b7634b52d7a7e1ef8361307a0bd63bfc2545f3487b2fb38072f1307f44d4b