Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c53ac01fec3b5c…

MALICIOUS

PDF

43.9 KB Created: 2020-09-10 21:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cc148f280e99a1121e3277d153b58137 SHA-1: be2161ed9b5391de6e0697369125d8aab4ee358c SHA-256: 45c53ac01fec3b5c9e66961cbde60cab69af259a5870680091d28916989e8729
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/wix?keyword=cisco+packet+tracer+student+7.+0+free In PDF document text
    • http://lunesud.carescoasters.com/uploads/1/3/1/4/131408229/nixizoradagul.pdfIn PDF document text
    • http://vojale.mollyharrisonart.com/uploads/1/3/0/7/130776068/refewununiwu.pdfIn PDF document text
    • http://powot.michelleleafloor.com/uploads/1/3/1/3/131380480/1628817.pdfIn PDF document text
    • http://files.aprilallysonabel.com/uploads/1/3/0/9/130969712/d46fc8bbbf549d.pdfIn PDF document text
    • http://midobav.mslaneapgov-econ.com/uploads/1/3/0/8/130874473/39e1ac2c3.pdfIn PDF document text
    • http://rofodeza.saturnfireworks.com/uploads/1/3/0/8/130813577/8f0f7.pdfIn PDF document text
    • http://files.davidmichaeldesign.com/uploads/1/3/1/6/131636766/3ab714.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/1/0437/0307/4984/files/kung_fu_panda_streaming_truefrench.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1863/9771/files/wapakupabeluwudalavopefus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/mitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8402/0898/files/eros_international_annual_report_2016-_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/web_email_extractor_free.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3402b1_a8927e7527654f05a0ce097e9deb9481.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7c30af_d08f86ccaa7141ccad40bb2a22547869.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4f270c_6cb7acef428f4245bf25737593e43634.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5360f8_fc6c88090b044882988e07de4dd894cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aef5b7_c4de8003120946cda79408a0cb55c2f1.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_off000065a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5340 bytes
SHA-256: 46c136debee8e686273aaa43e11195eb7c3d93f486074f0c7753322203ea8872
font_01_sfnt_off000077f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F4 13204 bytes
SHA-256: ffa4c0ef1486f432e2b43e5bcd4ced07123752a5e43151746a8919a825f04f99

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