Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbdaa71c80875f1…

MALICIOUS

PDF

61.9 KB Created: 2021-02-20 10:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 12fb151ea01afabcaed986320a4475f7 SHA-1: 5f537e63397f96e6952f9557600636b5e1e69826 SHA-256: abbdaa71c80875f1e7a1f93d36fdfcfa34580f3bd36a6d8ba8646cd51b77b5c9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=bradley+wellness+center+class+schedule In PDF document text
    • https://cdn.sqhk.co/zajagatetode/ifDqSxX/pofugezelanagil.pdfIn PDF document text
    • https://sabadefupi.weebly.com/uploads/1/3/4/3/134345863/7607644.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/fLjiges/popular_ringtones_2019_english.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/gcx9if7/42739085963.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/6242869187mcbny.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/142830.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/U5hdjjo/jade_craftsman_builders_llc.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/sOgejcK/fifa_mobile_soccer_2019_download.pdfIn PDF document text
    • http://detonic-buy.website/62456805029s7rfx.pdfIn PDF document text
    • http://maewallace.com/minecraft_steve_skinzago6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sivanira/android_one_list_of_devices.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/27831430382.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/84936650590.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/third_grade_math_vocabulary_worksheets.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_off0000b606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB606 5268 bytes
SHA-256: 7c1f87172e77a62a316fe585618420339c470f60a03ac223d6d34da90b0148e1
font_01_sfnt_off0000c800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC800 10376 bytes
SHA-256: a75f0c88ba6bda65cb4a73d576dd62b1f3b438cfaacc0c2b892db51543b2ecd6

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