Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec909afb3f3d6685…

MALICIOUS

PDF

40.8 KB Created: 2020-11-06 00:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 762fcc366e643863c4f612987a07afa5 SHA-1: c651b16e48d8749ad01c8622b00598822922b618 SHA-256: ec909afb3f3d6685211d09dd2fa10c1a30e0f0d43dde730ec597abada36009cc
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=human+anatomy+and+physiology+9th+edition+pdf In PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/7e0fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_5f992a65c762c.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/xupimaral/zilibajafoxakuponafudalij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e814fe-ac50-43c6-b185-c303075dd1ae/mefelawodabiziseki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/a_dios_le_pido.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/nusupekaxipiginoridekum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/gta_vice_city_cheater_apkhouse_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/gym_workout_plan_for_female.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/windows_movie_maker_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/functional_training_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc4a254-114d-41f8-897d-0cfa3d37ac21/3472963766.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/sekonilakimux.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/cuisinart_popcorn_maker_walmart.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_off0000641d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641D 5576 bytes
SHA-256: ab0f730b3bc82648f4df2f074848a4d151366a24bf7ff0e7cd6b906aeb1997e3
font_01_sfnt_off000076f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F7 9064 bytes
SHA-256: bdacd355fb3609f2f1e6846bdbe1153e515d481600d2df06292db6c518eefe1b