Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db17ef30be367ef…

MALICIOUS

PDF

36.2 KB Created: 2020-11-01 05:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 01dd23911f99688f931c9fe5c8b1360e SHA-1: 16add71d6df98439e88fa169eac88468ce8359d5 SHA-256: 4db17ef30be367ef20373e0b0bc09be9e4010d062c5b1822c1abe944e29b7a9e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=elixir+of+shadow+power+and+greater+arcane+elixir In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f91595e953e8.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/tumoboga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f8e42ef4f4ea.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/sovumejitukorereraj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5f904e9f8f951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5f91c10ec0a97.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/wutezigojuxi/dna_transcription_and_translation_practice_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8183/3882/files/types_of_ships_in_no_mans_sky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0607/7339/files/southwest_african_market_irving_tx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7145/0535/files/96491012851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0912/9629/files/kivomufabazixakavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3184/4771/files/37884225256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1213/5322/files/xopiled.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_off00004d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D10 5536 bytes
SHA-256: 0059af64444f9522e1de21b22f9ebb3139d849109c5cad144337b038103c01cb
font_01_sfnt_off00005ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 10456 bytes
SHA-256: d92d20c4198aeef6213079526f02284c86d57d51a01e95861fa89015b071ce19

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