Malicious PDF — malware analysis report

Static analysis result for SHA-256 125553cb624d4a47…

MALICIOUS

PDF

46.1 KB Created: 2020-10-26 11:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 25c50b033aa8481339100df3cfa0672f SHA-1: 3479e8614de27a14bec59a89ef705e8746f27cef SHA-256: 125553cb624d4a477b75c2edb48221da2ee3e30f244859ecc5dfb7e3ed82ca29
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=garmin+connect+app+download+apk In PDF document text
    • https://forovaze.weebly.com/uploads/1/3/4/3/134315943/lozerizedamagodewi.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/708371.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pevatupesa_faxurorelotarom_segemevixuvaxe_sudefigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000074be.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000074be.bin)
    • https://s3.amazonaws.com/gumagabu/dukaxomiripunusi.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/3d_exporter_for_autodesk_autocad.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/93327075038.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/99527790168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3645/7160/files/93819832489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0069/2373/files/95895573661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2229/4433/files/chapter_11_cell_communication_reading_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7108/7007/files/93010635571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0980/9864/files/xposed_framework_6.0_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/64540102503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/jimiradafavanorametekegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b0110e-a0e0-4817-a312-ffa8fbe1d173/29640846188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7e5991-d9e9-4a74-b8e1-fad370040866/kamemuwasidibinobelaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa2f070-e0ea-4108-97ed-7a0e21a979fd/10137859404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db943f99-0fbe-4f64-a75f-916d926735d9/93022043873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499599ce-98d8-47a0-9b76-ce49188505e5/current_gk_in_hindi_2013_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/pugiveputowomotiwikej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/esl_sheltered_instruction_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7756/7132/files/shs_reading_and_writing_curriculum_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3050/9254/files/ss_309_chemical_composition.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 extracted file (font_00_sfnt_off000074be.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 5228 bytes
SHA-256: f3d171e812757c3658cf2addf2da0c647852dbf4074e3a067cb508deaa5c8378
font_01_sfnt_off00008681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8681 10588 bytes
SHA-256: fb917ec8f99b2f4c3236bca16057ebc5abfdb8f7cb68bdf553930fdf8248b400