Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e54c1554e7305d…

MALICIOUS

PDF

57.6 KB Created: 2020-11-01 10:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: f618b93ee46b89be2e0a9431e6acccc4 SHA-1: e07aefdb7b0858fb4c8d2c49b5108c19fd4a14d7 SHA-256: 03e54c1554e7305d3838747adcd2a12cb5858335abb90268dfe55883e52e0d3f
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.me/123?keyword=echolalia+definition+medical In PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/lukonuwasopoju.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/mubeju-bavud-pakonevasesu.pdfIn PDF document text
    • https://dulopatejobe.weebly.com/uploads/1/3/4/3/134317335/6111193.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/latonud-nofazadexukopo-jakiwunulok-lovofanutobur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95760323-9e13-4852-acd7-6b363f0949ba/auto_likes_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5464/0537/files/39269381961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3032/files/i_hope_so_kodak_video_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0565/4686/files/ziridi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/63477900249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4838/4684/files/pmsm_motor_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5291/9703/files/12th_physics_gravitation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1421/5609/files/chemistry_college_textbook.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000af6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAF6C 24036 bytes
SHA-256: 3c3789c5c3edd40f6e61eabefcc8c30d43b312300bfb94bda451231426abef1f
font_00_sfnt_off00007630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 4944 bytes
SHA-256: 7c13ed8997b31ecc68eee51ed119f118c20758d26821303fe838d5c3fb42b109
font_01_sfnt_off000086e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E3 12020 bytes
SHA-256: b720c01ca1c89337e3797de3daa934e59e9f2b469a13bca966b0478207451f0f

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