Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7c5bfab8796c80…

MALICIOUS

PDF

73.2 KB Created: 2021-02-19 04:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c3fb5345a707ff27e84fe6eed1b2cebf SHA-1: 68bd8ee081597bed9393337a479ff50f618522f4 SHA-256: 5a7c5bfab8796c80e3e93f0a64ce1d11517b269d9b66368a78666b3dd081b464
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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/wix?keyword=max+testo+xl+cancel+membership In PDF document text
    • http://gaydating.world/aligarh_full_movie_filmyzillav6jhf.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/fonasoxon.pdfIn PDF document text
    • http://aslixan.com/40447863208fmn72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5ff543666fd30.pdfIn PDF document text
    • http://nicepics.xyz/piruzedepolozeruqilr.pdfIn PDF document text
    • https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/3041857.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/sojaxub/xokuvujebevuforix.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/92937372740.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/57760757990.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/budagogotage.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/cycling_holiday_in_austria_ielts_listening_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/xixofoluwobofaku.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/camera_fv-_5_full_mod_apk.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_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 5388 bytes
SHA-256: 82faf55dd56c8e004e7cb2bf93b4da97f34a5d472ef74ce8c015e9f3f85ce314
font_01_sfnt_off0000f395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF395 10552 bytes
SHA-256: 0cef9fa39c2c759f213d9c5bbdd987e3376b145aa56a02bd7eebf95d518d6673