Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e63400ea0c56a0…

MALICIOUS

PDF

42.3 KB Created: 2020-10-28 23:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: bb8b402b0109824e4e383aab4e3923d5 SHA-1: 217cb2805f984333dd6c30567c7f4094bc2be1c6 SHA-256: a4e63400ea0c56a0885b94d52520e5ff27af14de1195811faa81a2c16c9c09c1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=daft+management+11th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f91e61decc14.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/fogovesakujog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f99461c27698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_5f98993eab081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_5f94e0582ad48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leguvefu/98206618970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7498/9479/files/garden_of_the_gods_hiking_map.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/pdf_annotation_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/spikes_tactical_lower_parts_kit_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/android_change_spinner_text_color_in_xml.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/76338694324.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/attributive_and_predicative_adjectives.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/24655178740.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/kindergarten_activity_book.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/31442714469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda0a12e-15ab-47c1-b1d1-e86bb412d665/93255027456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1152/2727/files/11627325698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7456c42b-20a3-4147-8001-ba8d07ff2a56/lidewesatamis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cca4bc-eea2-4a66-858a-9fbe887fa8a7/pumafedunerido.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F3 4988 bytes
SHA-256: 45f6714e1c0dd43e9a468bffffa564d84cf17150e04844755efd9edb71cd25cc
font_01_sfnt_off000069cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 10484 bytes
SHA-256: bbb99a85363cd5c366193625545f1abcb51d11e1cb5c2d70ff98c87a6d0e8c01
font_02_sfnt_off00008da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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