Malicious PDF — malware analysis report

Static analysis result for SHA-256 78188022cfb71050…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 18:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8c2f5a6135679dd112cdc339bbb0a10b SHA-1: 6b4901e61f3fbc7fd9fb10620b08bccb30c9c3e1 SHA-256: 78188022cfb7105082d78d8f7d04bbf0124ab59155a190ea2ddbd60d7ab1fa76
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.cc/pify?keyword=manual+de+biomagnetismo+alejandro+lavin+pdf In PDF document text
    • http://files.mlrentalsinc.com/uploads/1/3/1/0/131069812/vatefo_wusis_xazanebebixufa.pdfIn PDF document text
    • http://files.reimagineec.com/uploads/1/3/0/7/130775462/rinuj.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/1/0428/9835/8432/files/vawis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2700/4572/files/retulofuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/autumn_leaves_piano_transcription.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/fekurenipodakovoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/40750702090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/gonawijitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/9732821821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/vertical_axis_wind_turbine_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/pro_tools_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/94674113650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/56920141849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/xewugiduzilogerad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/xekakalejavonol.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_off00005d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 5644 bytes
SHA-256: c09f39ecaa05dd90340ca21a94c96e32997bb11befb6c82ed44a80d7aa6fd246
font_01_sfnt_off0000707c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707C 11152 bytes
SHA-256: 5222a73672f71916c2a2692fd567b53b5711deff6aa4a43b58c16f9dc4eb9a19

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