Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0082fc3b5238eed…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 16:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 08140504f6b7ab73247f9d0818d04b5e SHA-1: 2a0deb69bd6aaa86f43b8d07f785b1c3b497ea6f SHA-256: a0082fc3b5238eed81c4f324372a564a6ae03917e7a5dd682be24c040f20437e
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.com/pify?keyword=conversation+anglais+traduit+en+fran%25C3%25A7ais+pdf In PDF document text
    • http://files.mattthome.com/uploads/1/3/0/7/130775825/durenes-jusax.pdfIn PDF document text
    • http://files.awestar.org/uploads/1/3/0/7/130740116/3152742.pdfIn PDF document text
    • http://mikelij.markbrayfineart.com/uploads/1/3/0/8/130874493/6499366.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/41854904615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5105/6285/files/46092769958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/76183332764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/78683671029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0356/7515/files/6541253765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/rexroth_pneumatic_valves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/42314455630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/nexizesalit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/80739120341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4453/4429/files/list_of_mineral_acids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/kaboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/xivakavadaluxaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/15544526088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/faroselodev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuvuwagel.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_off00006ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 5356 bytes
SHA-256: 79627b5fd54366b897939cbc1cb31d306e2528888fdab4773674f1d5f8d4001c
font_01_sfnt_off00007df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF0 12744 bytes
SHA-256: 2e64f0d021f86e854d1acf4ad8e7764136be55e2828cbf359ef39f8de0926b2c

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