Malicious PDF — malware analysis report

Static analysis result for SHA-256 3353d34a50a971cd…

MALICIOUS

PDF

68.6 KB Created: 2021-02-13 17:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4a7f4e9c637c3806d25ee26adb8e90cd SHA-1: 69faff74d8f9a51c713aa2f2c3c18fe4ac96b566 SHA-256: 3353d34a50a971cdcdb0d26cd465473c5fc5a9f70fb5d5302431fa50dddee559
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://bologen.ru/wix?keyword=biology+dihybrid+cross+worksheet+answers PDF link annotation
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/talawesevad-dejisinugu.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/junusesidoke.pdfIn PDF document text
    • http://ruginegil.22web.org/zomexilegif.pdfIn PDF document text
    • http://vefavirona.22web.org/76827712695.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/mutimu.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/tetenifeme/empirical_software_engineering_journal_latex_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/flight_radar_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/32977924617.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/free_expenses_claim_form_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/engineering_computation_paper_template.pdfIn PDF document text
    • http://pagiwufuvefukuf.epizy.com/dupagixojelesugotakom.pdfIn PDF document text
    • http://faberaladaruz.epizy.com/physiology_coloring_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/skype_for_business_64_bit_filehippo.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_off0000cf73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF73 5648 bytes
SHA-256: 744ee08a68e63a38ad429cfaea779ced27052d0bdc09581c3b7975fbf40e69bd
font_01_sfnt_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 10060 bytes
SHA-256: 9eba368a94ff2086b07354d0e9f20209ad2a69d64b43d4c083b04fd3687b4905