Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbc812e3cadca8b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 05:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 17dcf17bf44e5cf939f5a9c7d4a6fb0e SHA-1: b3cbb9a61be62286aade060a7671d06f7737b70d SHA-256: 1fbc812e3cadca8bc97ba0da6df47df256b88243a4b6b211c03655254f3d3cc0
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=business+process+modelling+examples+pdf In PDF document text
    • http://files.njlunapizza.com/uploads/1/3/0/7/130775649/685478cce7.pdfIn PDF document text
    • http://files.nccueagletravel.com/uploads/1/3/1/6/131637484/kunofudetafedarepaba.pdfIn PDF document text
    • http://files.coastaljetsetter.com/uploads/1/3/2/6/132682030/4181204.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/1/0436/2344/8736/files/difumev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5612/8412/files/7705972954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/audi_a8_fiyat_listesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/zezebozukogofituvagofuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/47299526002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/fobetujapox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/vorobijavexake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0285/files/worafatibulexisuradixijar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/dumesibaxupivafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7218/3710/files/responsive_classroom_teacher_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/vasirexawalejefuraxevute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/75908385146.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_off000066a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 5592 bytes
SHA-256: 5c8ef829531ff19043a8f1885c3cc9edc1e228e8a1dd446ac2b8a2770c6849ef
font_01_sfnt_off0000799d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 9896 bytes
SHA-256: dc2f0b1b193a7c071ecf0f86ed96d2d5aa8f6f2771c20119bc7d55e69d0b2c9c

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