Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d62d62ad487ab15…

MALICIOUS

PDF

53.4 KB Created: 2020-10-24 23:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6d4a6e564949c3bab760767b174dab4c SHA-1: 02ce14947d9412e611f7b1a763af984d1bead1d2 SHA-256: 5d62d62ad487ab15ec46b5cddc27a43e1deffa08302b6f42bcc950c91cf1cb56
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/123?keyword=earthquake+network+pro+apk In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/fufeg.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/bovizurabigub.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/563128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f8cbbe5d3597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f8f6da17ef89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f87452c60195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_5f924e34a21fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f91e644dff1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f914fa2aab2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5f91f34308751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f8bd84c3d3e9.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/xanebavifamopez/concepto_de_parestesia.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/amliorer_mon_franais_oral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6901baed-ee3c-4f0b-b817-58c68680edb8/nzxt_kraken_x62_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245b6994-5aa3-41b7-84e0-46c2d4fdf448/68154821787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb24dc2b-3076-4596-9840-51c8abe06a82/guide_words_practice_worksheet.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a1e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA1E5 21464 bytes
SHA-256: 2e6aff44befe100deacd3ddedfa2a999b92c051973b77e36ccc1f63998eb7034
font_00_sfnt_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 4936 bytes
SHA-256: ee24cc346e354832d7681056fac09bcc049513bc0619e7bb252f8a22ed92173f
font_01_sfnt_off00007172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 2464 bytes
SHA-256: e2471563708f8728ce2eaf177b5360effcf222f88fef6f1e84702366dd34a49d
font_02_sfnt_off00007c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 11036 bytes
SHA-256: 5f1945bab595ac702095c9df694d553fb7cd8578fa1c288d02af46bbee770afd

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