Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cd6cce803e177e…

MALICIOUS

PDF

73.4 KB Created: 2020-12-25 23:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a1a72da8390d607e11072c5ede610d59 SHA-1: 9f1812c77a1396856c9af26c88eb6bd2e18a90db SHA-256: 44cd6cce803e177ee255cc36a1821574472c1a7f62726b23d7f47e48013c0ae0
254 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
  • 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://ggtraff.ru/wb?keyword=battleship%20texas%20state%20historic%20site In PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fd330b8d17cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_5fdad74856c66.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/sitidosugutixe_bafunisi_lefujugapikor_fagewegaboniki.pdfIn PDF document text
    • https://solugukaxazazo.weebly.com/uploads/1/3/4/7/134748989/besizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5fa455fdbfb9f.pdfIn PDF document text
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/xapotujoxave.pdfIn PDF document text
    • https://fiwaxajosikevi.weebly.com/uploads/1/3/4/8/134885015/2b1ba75f2.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/rixevozajixezos/monk_mistweaver_heirloom_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/84792758892.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/xukegotobawute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a969803-1d39-47b4-a66d-d003fa095452/84341449081.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/request_for_relieving_letter_email_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2377b1f1-cf17-4805-8444-bdec7f617fbd/73727750633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdec872f-b7ef-4349-9ec2-1cc777cc64e8/16797683284.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/bemesurotazo.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_off0000e000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE000 5140 bytes
SHA-256: d62480161cbcf8a4eddf78eb920d542735015b6638fba94f276cb8d3d5e4307e
font_01_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 11476 bytes
SHA-256: dcbc61c1b6daf24d9cabdd41ed45a948316ffe8dc832956e690c71abb08c19d8

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