Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fd3c0e78bc6663…

MALICIOUS

PDF

78.2 KB Created: 2021-01-27 05:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5892bfdb3cd5ca140f0c27dc6a34d80a SHA-1: 411864bae9c2c7ecd9c00d163af0538fa17ae3e8 SHA-256: e3fd3c0e78bc6663d957f7122456ab6c4a06a64b17b6cb4840f1ac2467e89b12
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/aws?utm_term=allengers+c+arm+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5fe260a40ad2d.pdfIn PDF document text
    • http://zijiwox.iblogger.org/lend_lease_group_annual_report_2014.pdfIn PDF document text
    • http://lofitner.buzz/517852384019bnan.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/xabukevipe_sawegisikuvujiv_zupafetabudaw_jodotonutodutip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5ffbc7583045d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_600df063a2545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fc6b467f09e0.pdfIn PDF document text
    • http://dogosufomume.iblogger.org/e_wallet_app_for_android.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/kumowazidolukaputzvcbk.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/kofiresuxu.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/the_hacker_walkthrough16pk1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5ff3797edfa53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolatuziguxobe.rf.gd/72516336394.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/fofamuvofisesakumuva.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/chalk_and_duster_songs_ming.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_off0000f5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CC 5108 bytes
SHA-256: e325d977d4b0639a0a6e511caec0b21016484d833bcfdb87a1fa4da8041ac371
font_01_sfnt_off0001071a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071A 10908 bytes
SHA-256: 0f3ae2d35ba97e621ec547814d5e1b95b44d1bac912eac0747fb2d151d9e8442