Malicious PDF — malware analysis report

Static analysis result for SHA-256 c221d3513314bfef…

MALICIOUS

PDF

35.7 KB Created: 2020-10-02 13:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7766d46efce2b840951afdc2efc9ad28 SHA-1: 29aebe9d5cd4112e250117945c4056bfc4ba1bea SHA-256: c221d3513314bfef0f93e32cbcb1214f3b4c70da34ae91ebc89a4371bc1ad9c6
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://gettraff.ru/strik?keyword=the+ravine+by+graham+salisbury+short+story In PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/vojidokufavurogamazo.pdfIn PDF document text
    • https://site-1038901.mozfiles.com/files/1038901/51763911414.pdfIn PDF document text
    • https://site-1038470.mozfiles.com/files/1038470/kotudijixowukofuru.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/ruwowikajinapelagudamo.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/kifabajitabufopeboxejisod.pdfIn PDF document text
    • http://files.bvausart.com/uploads/1/3/0/7/130775672/roziripigevimesev.pdfIn PDF document text
    • http://files.alertdriving.co.nz/uploads/1/3/0/7/130775633/8799309.pdfIn PDF document text
    • http://kojoga.jamaicanamericanbar.com/uploads/1/3/0/7/130740019/xifevefekisuja.pdfIn PDF document text
    • http://files.backcountryexplorers.com/uploads/1/3/0/7/130775436/caa67.pdfIn PDF document text
    • http://wujesi.brianchovanecknives.com/uploads/1/3/1/6/131607984/2853900.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/gafagom.pdfIn PDF document text
    • https://site-1040669.mozfiles.com/files/1040669/66918932398.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/88063548738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/bastion_of_twilight_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3568/3747/files/velitaxitenegobofagot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4588/8415/files/spy_video_games_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/mavic_open_pro_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8071/files/mindfulness_coping_skills.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_off00004dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFD 5352 bytes
SHA-256: bf3a2e7e2d570d7384bf9109ae9f33c8ff74e7f0889029620e41d948999949f1
font_01_sfnt_off00006013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 9812 bytes
SHA-256: 09569f3e2437de8e1f43d3cc4cc5177818e0df7d81faf24ccafaf62b13f4fa81