Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22d0a574809c7c6…

MALICIOUS

PDF

67.3 KB Created: 2021-01-23 04:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2a8fb0172921f83c12969e45c6fd7aea SHA-1: 566d397d99053e4fe6b7b85c71b3ecefa1515fc7 SHA-256: d22d0a574809c7c63cfc54b3b09a3101d3bf966ab8d9c8b7cb0037f83529f07a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=delicious%20butter%20cookies%20recipe In PDF document text
    • https://site-1180366.mozfiles.com/files/1180366/call_of_sniper_mountain_shooting_3d_hack_apk.pdfIn PDF document text
    • https://site-1176306.mozfiles.com/files/1176306/zokurumorojikomijajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5fc6ab2597eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_5fd10ff792b45.pdfIn PDF document text
    • https://kaxepiset.weebly.com/uploads/1/3/2/7/132740291/nakuletujel-tugup.pdfIn PDF document text
    • https://zuzoperelalame.weebly.com/uploads/1/3/2/6/132683259/3595346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fe5e351880bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465709/normal_5fcc53e13be05.pdfIn PDF document text
    • https://site-1174819.mozfiles.com/files/1174819/37185376616.pdfIn PDF document text
    • https://site-1215079.mozfiles.com/files/1215079/namoxexamenakofaxule.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/gajakelegeza/zaraduwigojunawomilesaki.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/53527939018.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/jukujudinite.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/jolizuzif.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/identifying_adjectives_and_adverbs_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_off0000ca75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 4920 bytes
SHA-256: ec83beab40ff2758d1f0225395e90089e074fd048a39d3c08172c365e574c5d2
font_01_sfnt_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 10972 bytes
SHA-256: 3a5c571a8b856c3ff3f72d910bf24a4a7851211e185fef704265a809c05c96c8

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