Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3c9648bc3a72cf…

MALICIOUS

PDF

73.8 KB Created: 2021-01-27 23:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d3099522caff88926ff50db03b656636 SHA-1: cfebbe05f0bc3ca4b8672ffe6947294f86c19680 SHA-256: ff3c9648bc3a72cf2b01fbc32b94c255335381deeab64d5121e7494a067bf23d
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wb?keyword=fire%20ant%20colony%20cast%20for%20sale In PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/ledebufemimama-bobakamofizafa-luxusi.pdfIn PDF document text
    • https://razotipelemato.weebly.com/uploads/1/3/0/7/130738732/61186215e.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/sizofavonabevupezefa.pdfIn PDF document text
    • https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/408680.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/wevemi.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/28c423296dc.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/sosupejuxofedo/difokazitibutujitazoduxo.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/mosotulujufak.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/additional_information_support_your_application_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/segalovosetij.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/chicago_manual_citation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/descargar_aplicaciones_android_al_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/51166690296.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/ielts_speaking_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/35510310870.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_off0000e287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 4932 bytes
SHA-256: a72930ecef1c071c2682c943cd5c32d7ed6d73529ea185195b90d4053509c3f7
font_01_sfnt_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 11316 bytes
SHA-256: eafadf4a78fcdb3a4eed0570e803c561bc80b4a2adef811f5bd2dd9f28fbc49e

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