Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01a061b533b554d…

MALICIOUS

PDF

68.4 KB Created: 2021-02-14 09:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1cf8d5185ed744d0818c100b6c2d28f2 SHA-1: ec2889c29b70320b5b320d835b0b1a835732c860 SHA-256: a01a061b533b554d4512f143d0124e1936bc9f9cf8c0071ee60164845ce961f0
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://leonvi.ru/wix?keyword=samsung+account+apk+android+9 PDF link annotation
    • http://jilet2.club/oscar_winners_201911cx7.pdfIn PDF document text
    • http://islemleriniz.org/momentum_and_impulse_worksheet_answer_keyye773.pdfIn PDF document text
    • http://mists.space/60757167148lit4x.pdfIn PDF document text
    • https://jedavosezinuli.weebly.com/uploads/1/3/1/4/131438835/1313214.pdfIn PDF document text
    • http://copyrightnotices-form.com/fashion_show_playlist_2019mtcui.pdfIn PDF document text
    • http://quinzsy-studio.design/japanese_hand_saw_cutting_guidee6xui.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/divikufifir/welag.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/40985690571.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/mefizowalirofuvasi.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/exterior_angles_of_polygons_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/skf_bearing_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/best_kunena_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/83948325554.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/asus_aura_software_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/c_convert_ienumerable_to_list_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/kefolija.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_off0000ca0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0E 5684 bytes
SHA-256: b974274a16cdc9a83cfc05ee3b16bb6f1a925265b9ca4e2938d46c850847b26b
font_01_sfnt_off0000dd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD58 13008 bytes
SHA-256: 4f4e1a33452d33e24af450a1090cdbd5ca78b83769d1faf27ffdb8b7a35a17a8