Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16da00304521f5e…

MALICIOUS

PDF

74.9 KB Created: 2021-02-25 16:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4b959df31841ca1b8411cc7fac5520ed SHA-1: dc861d52edeb6c7421341fdf060440bf011daa54 SHA-256: e16da00304521f5e0e271f2ac9aee1d91a2a50f529050919e8ad058c5aea1f9d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://crophysi.ru/wix?keyword=cooking+merit+badge+worksheet+answers+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_60335fffb1c97.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/53837163478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fdc35e36ec1d.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/cant_help_falling_in_love_piano_chords_elvis_presley.pdfIn PDF document text
    • http://vixurefivero.66ghz.com/88812572656.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/kezaxafi.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/tabobujimo/brave_fighter_2_legion_frontier_apk.pdfIn PDF document text
    • http://xifusejikudit.rf.gd/vadoji.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/xajuzukuloza.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/ccleaner_full_crack_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/taduwaposefel.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/78026909218.pdfIn PDF document text
    • http://nipipaxala.rf.gd/vikemowidepukasubafad.pdfIn PDF document text
    • http://bujavajivedejin.rf.gd/16232774510.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/infinity_reporting_group_llc.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_off0000e766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE766 5928 bytes
SHA-256: 825434d51c102cae8ccea8355e35a3d52800d9ce400a628473126579ad264881
font_01_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 10296 bytes
SHA-256: 6cb8aabb27361487eebbecb9c44850256961c50f4af278717ec13bd41ccb2f82