Malicious PDF — malware analysis report

Static analysis result for SHA-256 321a513c93461b9d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 19:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 56073a0d32f0f9b36b5202583048340b SHA-1: 2cc775cf05a0832be1febf2ba68cf68f915f5767 SHA-256: 321a513c93461b9dcc8f7850bf8c5df72b2b3c10e6c9b301d6cee23c6ada7d61
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.ru/pify?keyword=keepers+of+the+kalachakra+pdf+free In PDF document text
    • http://files.negritacomecoco.com/uploads/1/3/2/6/132683252/6913302.pdfIn PDF document text
    • http://files.slotharoundtogether.com/uploads/1/3/1/1/131163669/4630217.pdfIn PDF document text
    • http://files.corriebeth.com/uploads/1/3/1/4/131438155/5174022.pdfIn PDF document text
    • http://files.groove-consulting.com/uploads/1/3/0/7/130775528/2960184.pdfIn PDF document text
    • http://files.biophilicdesign.net/uploads/1/3/0/7/130739831/wogowitiku_fatezidugoda_goxam_wefulipujasug.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://cdn.shopify.com/s/files/1/0430/4506/0762/files/bonefesilavanoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/sedaboxibegofanejuzaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/catechism_for_filipino_catholic_tagalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9470/3270/files/astrology_signs_and_meanings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/marvelous_techniques_for_ielts_writing_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/71395059056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/rapebijaxovuxapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8534/8510/files/how_to_install_ngrok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9706/2564/files/wiwiwevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/jozagofaxag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/modejuxuratisi.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_off00005cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD8 4912 bytes
SHA-256: ca4983a3ef783895c56e4522e6e88999f7ad69522190380a069491a0333809ce
font_01_sfnt_off00006d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 9388 bytes
SHA-256: 7c0d88e5d06f828e14e446db5db3af9bbf1ba502c3408060683465d03ec8a19a
font_02_sfnt_off00008daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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