Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26dfab6abedd3f5…

MALICIOUS

PDF

71.6 KB Created: 2021-02-25 00:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4669da3f49176021d67fb65018f454a1 SHA-1: 4b7ebbe4242f079e6fa1e869abd232b393ec0737 SHA-256: a26dfab6abedd3f5e8a6d1c26648d9a7757eb6597596c25189fea4016284c32a
196 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
  • 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/award?keyword=how+do+i+become+a+substitute+teacher+in+new+mexico PDF link annotation
    • http://copyrightshelpscenters.com/zikizonirelipawedocfct3.pdfIn PDF document text
    • http://rawenspant.online/android_emulator_paling_ringan_di_pc3tgzd.pdfIn PDF document text
    • http://bbcua.site/rigugnssz9.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/b752b9.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jigfjd8/mavozotugilafurodogofume.pdfIn PDF document text
    • https://cdn.sqhk.co/fakolafebu/jLJgdgh/70580712385.pdfIn PDF document text
    • http://goloszauniver.fun/betixebftz3r.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/fZhiUie/black_ice_hockey_training_jersey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5fe087f41e6e8.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/xakusineba/holidays_in_pakistan_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/vejolevapikufiju.pdfIn PDF document text
    • http://jiwajazaj.rf.gd/bawofivisobefisupezol.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/19298749953.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/penekejosivexoxel.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_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 5408 bytes
SHA-256: 41135cc3f12c5311910c271881200c9a3478ac17de633418fd9cd26474855c45
font_01_sfnt_off0000ed17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED17 10660 bytes
SHA-256: 4259b3510d21ab81031dffdbca437387e986ac693ae8160b771e8dc5366ec660