Malicious PDF — malware analysis report

Static analysis result for SHA-256 8081c218d24e9e2a…

MALICIOUS

PDF

35.6 KB Created: 2020-08-25 21:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4b40605db95458a6d7dcdb363e6b40f7 SHA-1: 3307a55cadb808900478f8857f50516f7e7242a3 SHA-256: 8081c218d24e9e2acd0e5064ae686cdcd03333ebaceeba49d7dec8bffca61982
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://ttraff.ru/pify?keyword=ejercicios+de+configuracion+electronica+doc In PDF document text
    • http://semuget.jorgegomezelizondo.com/uploads/1/3/0/9/130969192/4396906.pdfIn PDF document text
    • http://wibenaruj.uofaasce.com/uploads/1/3/1/8/131872269/vupemomo.pdfIn PDF document text
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.pdfIn PDF document text
    • http://files.smileytutor.com/uploads/1/3/0/8/130813132/vupivujunegorol_geleponale.pdfIn PDF document text
    • http://files.sampacloinc.com/uploads/1/3/1/8/131871705/lefokikavanegubefox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/gafepuvubuvimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/kutty_video_songs_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/92423026384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/pabuvisuxarevokezozedil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/zejax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/51180280096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/66409906695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7976/files/fulebigumivid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/adobe_illustrator_cs5_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/4922780202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/carbon_black_response_admin_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/kuvoxujizogolafutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/best_hydrating_sheet_mask_singapore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/7514063634.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_off00004bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDC 5220 bytes
SHA-256: bcf29477dd6526abf794b4d5bdca2e834a60704f60e66f9afa8a3887b31175f2
font_01_sfnt_off00005daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 10296 bytes
SHA-256: 004cbb88610e953a777203689949d0b34eb657ede319ea4a416d6b0ae2a40fef

Open this report in the interactive analyzer, or submit your own file for analysis.