Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4fa7eb67cded07…

MALICIOUS

PDF

45.8 KB Created: 2020-10-21 12:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 85c2b24c80a599d303fed293362128b9 SHA-1: 9c661bd24a5278bd3788786cde6416bfafd0b355 SHA-256: eb4fa7eb67cded078cd59599a77d23ed1fd70104c0892b8aed277d1093cad432
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://gettraff.ru/123?keyword=hobbico+quick+field+charger+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f8a0bc131f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5f8fc8e99177e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f88ba542d636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f872e607c8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8a6193af8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f8d9c7071e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f875bebd7421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8c9ea73301d.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/jamokaroxoj/tutimafafowosezunuwuvel.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/75163460214.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/mibanifexuxeximewezaj.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/32221426390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/threatening_with_a_bladed_article_sentencing_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/3704/1331/files/jixovoxulapazulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5312/5284/files/mikrokosmos_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0489/2973/4840/files/lisepijerokinatutatafu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/antibiotic_sensitivity_test.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/catalogo_ikea_2018_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/52338914590.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xodon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1658/4855/files/readiness_to_change_ruler_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4489/5392/files/download_root_genius_apk_ver_1.8.7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4222/1461/files/mountain_view_aquatic_center_gardendale_al.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0038/5695/files/partituras_clave_de_fa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5361/5770/files/rubiwumitepitedoruv.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_off0000718e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 5548 bytes
SHA-256: 0530aa95eeee6b5f1a9e520f143961fa391dbbb2ca71a4bfda2abac05db217f8
font_01_sfnt_off00008439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8439 11140 bytes
SHA-256: 5cc65376648f830b9c8dc0b1bb28700cd41c769116cabb2e63dd60f8a3c6930d