Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c6fd1bdad95432…

MALICIOUS

PDF

37.5 KB Created: 2020-07-14 16:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6439fd3c9d4b61a30aff3c57cf061de9 SHA-1: 5f263f122cc3d7c35ac14e503dacc1ffceea55e2 SHA-256: 00c6fd1bdad95432cabd9a803fac28e9e567ece1eea11fba1a01900b38c827a0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document is designed as a lure, presenting itself as a service manual to trick users into clicking a link. The embedded link redirects to a known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/wb?keyword=1996%20kawasaki%20vulcan%201500%20service%20manual%20free%20download
    • http://files.allforkidscenter.com/uploads/1/3/2/8/132816165/4904470.pdf
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • http://files.communitycolab.co.uk/uploads/1/3/1/4/131409761/dawejajuno-larajivaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vajozix.files.wordpress.com/2020/06/51421337589.pdf
    • https://vikozapu259838642.files.wordpress.com/2020/07/19673573292.pdf
    • https://vosivulapib.files.wordpress.com/2020/07/jebosise.pdf
    • https://borafitafule.files.wordpress.com/2020/06/26740324751.pdf
    • https://biwogedudil.files.wordpress.com/2020/06/50210144564.pdf
    • https://mijawodemim.files.wordpress.com/2020/06/pigefave.pdf
    • https://dowutoweviki.files.wordpress.com/2020/06/supofulizujipi.pdf
    • https://mitalaj.files.wordpress.com/2020/06/xoniganiposurulotem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/bujagegukewerekamur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/97615710418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/38357209067.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/88113129958.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/sativuvibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/lolixinafoto.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba1.bin
39e59a77127af0ee2e1c9b6daf6059f410e4601bd03d45853421d85bb7892847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 5716 bytes
font_01_sfnt_off00006f0c.bin
e3b3ae81863d6175b99cae133690edcab7b3e0c476d706a98445191d825a79d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0C 7480 bytes

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