Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d06e04b3eb18cd…

MALICIOUS

PDF

71.9 KB Created: 2021-02-21 15:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e0faab3e6623e4d6013b5dfe5f95d559 SHA-1: d06ee2e34b87122271c5caeb01166f4b3a9337ee SHA-256: c0d06e04b3eb18cd9fb0be5ac411994c8a10996c1b5ac728af030a4c589a02a4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high-severity heuristic indicating it's a lure linking to an SEO redirector, likely for phishing. The ML classifier and ClamAV also flagged it as malicious. The embedded URL, https://baarspo.ru/wix?keyword=producer+driven+commodity+chain+example, is the primary indicator of compromise, suggesting the document's purpose is to lead the user to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=producer+driven+commodity+chain+example PDF link annotation
    • https://cdn.sqhk.co/kigaratak/gcftvmq/xawugubexe.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/UWU5yUq/siwewidadala.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/Gn7jbYS/gigenopuragoloropoziruxu.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/ic5jbld/47640438275.pdfIn PDF document text
    • https://cdn.sqhk.co/nedivixozu/fWZSheA/wivaniwozuwav.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/iW8hjKp/biwifi.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/mih530U/93454227037.pdfIn PDF document text
    • https://cdn.sqhk.co/bozomixega/7if0jiN/us_history_quizlet_chapter_4.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/dYgjibu/townest_alfred_s_adventure_strip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lerezazo/google_cardboard_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/92883388748.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/xajotibawotana.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/hunter_irrigation_controller_manuals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 5248 bytes
SHA-256: 3bc9e0a602743291f8323ca31e3bec3db17982ee5bbf2377c742d3e05f150297
font_01_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 10032 bytes
SHA-256: 2683df67a097aa1c42bb42f016155bf2dddd29f80b46c62dc5209bd16b492e26
font_02_sfnt_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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