Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f40a02f2a74ac57…

MALICIOUS

PDF

37.3 KB Created: 2020-08-02 05:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 849795efe8f005407cf74497a8e237cc SHA-1: 298457a71c32a562c8e58e4e2768864e87a6c430 SHA-256: 7f40a02f2a74ac574676bb813cb5de41d15b0c2bc1a12079211c18dbef951eb0
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=pmbok+5th+edition+free+download+pdf In PDF document text
    • http://files.grannysbibletalk.com/uploads/1/3/1/6/131606325/fbd763c88a.pdfIn PDF document text
    • http://files.nantucketislandfair.com/uploads/1/3/0/7/130739750/saletesiz_lirorumuxiko_vokig_fufofigavudi.pdfIn PDF document text
    • http://files.everyday-regalia.com/uploads/1/3/0/9/130969032/9931932.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/1/0437/3794/0117/files/ferimuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/tiratimevufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/jipiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/fenekegenisawepaloxew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/vipojadawegutujokaguluxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6961/0907/files/basuviragevijunejuzanakid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/ximogimuveduner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/girapesuxivaxaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/46698617124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5890/5759/files/dixepisope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2600/4642/files/54525150459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/saxipaxipepakasalitoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.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_off00004c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1A 5524 bytes
SHA-256: c3232c8affde83567824f792a55e010009b2e1a7b92dc862de16b2605fb5dbd4
font_01_sfnt_off00005ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 12508 bytes
SHA-256: e29e35a6e0a10976bda61f45a3ed0e0d9be3d0695b1f51b758de9f67c8230d21

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