Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc7eb5910efea44…

MALICIOUS

PDF

42.2 KB Created: 2020-11-08 08:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bd18faf1173257decea5036cb4bfbd99 SHA-1: ddd6a5bb6803f24076559ed153d7caeda294ae09 SHA-256: dcc7eb5910efea4412455f0c326ca2c9f4abdc3b3d03d7ad91b19987192c83c5
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://traffking.ru/aws?keyword=definitive+guide+to+dax+2nd+edition+companion In PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/521777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_5f9577ad33293.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/8622241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5f9624e2d65df.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/litunux/alton_brown_chili_good_eats.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/26816348328.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/unblocked_games_76_learn_to_fly_3.pdfIn PDF document text
    • https://ruxudaverotu.files.wordpress.com/2020/11/62956678797.pdfIn PDF document text
    • https://nanonekunare.files.wordpress.com/2020/11/anatomy_and_physiology_coloring_workbook_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/map_of_wellpinit_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/a_manufacturer_of_cellular_phones_has_decided.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/123_movies_maleficent.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/71660037742.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/9020068998.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_off0000639d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5428 bytes
SHA-256: 3a7870ff94e52597fe87c2e838eb1a659b5e10b0eaaf2c746089fc206dc50dbb
font_01_sfnt_off00007627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7627 10912 bytes
SHA-256: 6a998c0ab3505e99a03af42b78c0b1633c055af715a4ff36692b4b7ccf858114

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