Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb220bbef0a6d75…

MALICIOUS

PDF

64.2 KB Created: 2020-11-06 20:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 7c152a0ae241942dc55754ba17284ff9 SHA-1: 68100a9bda3a39fe2f09aa77646533ab83e02208 SHA-256: 1bb220bbef0a6d75a016c9a831cbec89c5dcc537ba6d5ccfdab691579ca3ac8b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffine.ru/aws?keyword=ncredible+bluetooth+headphones+manual In PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/zalipemejuji.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/babesipaxuvujemefuxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01ba12e-1c46-4522-b470-cba40d3dde01/gabimutenoxid.pdfIn PDF document text
    • https://xejigavo.files.wordpress.com/2020/11/waters_acquity_sample_manager_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30037bc1-fa23-47b7-9c44-23c405195647/41203669972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccddc76-2ce1-4bd9-9b4e-998711159fb3/xigufabulumevabutivegopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f47d98-fa6e-4b9c-817a-648429480a0c/tarkov_ammo_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147c173e-c63f-44a6-806d-15f6731e8905/translating_algebraic_expressions_worksheet_math_drills.pdfIn PDF document text
    • https://woxawekobati.files.wordpress.com/2020/11/94558739047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a3e5b9-9b19-4cb6-ac31-2640683d0569/baixar_manual_de_especialidades_desb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7fb779-8df8-45a6-9243-0f3f9e8801fa/snowplow_snow_pusher_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/67869448325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08bae65a-7ca0-440b-9201-d446469d95f8/ucla_career_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/wvu_law_study_abroad.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/how_to_delete_instagram_messages_thread.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cd10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD10 22124 bytes
SHA-256: 471d0717c8e602f1c25b1b832bbd6d040191ca596f2621c68c5ea38086dec4a2
font_00_sfnt_off0000949d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x949D 5424 bytes
SHA-256: f556cdc6357d5db2084edef24a5d9387c11f641762e00e61f0a5b6223f606bb1
font_01_sfnt_off0000a6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DC 11144 bytes
SHA-256: 885c985c8ef6a7bfefd7e779b0e44476f4466647e574a3b0eb2de90745663912

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