Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70812218a3dbed1…

MALICIOUS

PDF

47.8 KB Created: 2020-10-27 09:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 0a78327bff1623588520475adc517c27 SHA-1: 6bcbf72a42c572b5af66ac62b6f3eee6c652b9ea SHA-256: a70812218a3dbed185d2676bad6cba14a9a32bbc9d6730376331545075a6d934
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://cctraff.ru/strik?keyword=reinforcement+vs+punishment+worksheet+answers In PDF document text
    • https://zovodexipelozas.weebly.com/uploads/1/3/4/4/134401167/kakelepupi.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/kudob_remetodimopavi_fovapo_merep.pdfIn PDF document text
    • https://mizuzakulidux.weebly.com/uploads/1/3/4/4/134471721/fivatosejip.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/fbcba4.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/671e2f23405e8.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/a9f12b2aa1eeba.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/pazifetanegapu/57448264789.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/different_staining_techniques_in_microbiology.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/power_amp_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/27067128634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8820/8559/files/download_tiktok_apk_for_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/lezijopexafep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4852/5735/files/wovuwidenezenevaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8411/2569/files/notice_to_remove_personal_property_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/7059380717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/horse_craft_download_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/advanced_paediatric_life_support.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/descargar_comic_asterix_y_obelix_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/52977431555.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_off00007b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9A 5444 bytes
SHA-256: 51bd004414bbc5f8670e54ef50a49f8c4182ca0da681d5b25a9039764851d5c5
font_01_sfnt_off00008e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E13 10300 bytes
SHA-256: f84cee9a9c9748c028465ab0c23e496fa83d00278caad46d5d7386f9ef457ac9