Malicious PDF — malware analysis report

Static analysis result for SHA-256 12407197e7475bc8…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 10:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 10e258c1244a77792b11c9c07469e4d8 SHA-1: 0027b5ca9368d1ab10632b525a7a231e5181eba1 SHA-256: 12407197e7475bc8cc323ff0b68b83a35eca6a3c66c7f1f6d31094a4f2fca754
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/award?keyword=cuisinart+pro+custom+11+dough+blade In PDF document text
    • https://sazotavivi.weebly.com/uploads/1/3/1/1/131164406/xidimopotopafe_miwiwakesebunek_jibajeloru_tavumulowekupe.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/8251e21f.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/48394425032.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/1dQwhfK/sago_mini_babies_jack.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/b4a57cfc44.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/hj7bFhg/adidas_yeezy_slides_colors.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/idsigii/vanilla_caramel_ice_cream_cake_recipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujedofagogi.epizy.com/xovekisina.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/67713238689.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/nadepojakedoganiwafug.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/discord_server_advertising_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/3d_shapes_worksheet_kindergarten_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/barcode_scanner_android_zxing.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/animal_classification_word_search.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_off0000de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 5584 bytes
SHA-256: ee76337c25c3584b7632c03622e8abeaadf1aecdbea65e1ba9ad9f4fa79f868c
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 10556 bytes
SHA-256: c65a32236a190bc8dd7ef2d698a7df43cf4050e3e041155462dd230a51b69692