Malicious PDF — malware analysis report

Static analysis result for SHA-256 916373f14eb196e8…

MALICIOUS

PDF

50.3 KB Created: 2020-09-16 12:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 02b379c913f796d6ebb7f709e99b9e44 SHA-1: 784f3df00f749fdba31e7cb50a898941e6a6bf06 SHA-256: 916373f14eb196e8f009f084bef154b9249a0cbdbe85f6f7e90fd174cf93d406
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.club/pify?keyword=formula+vee+for+sale+near+me In PDF document text
    • http://zofubiz.anunexpectedartist.co.uk/uploads/1/3/1/0/131070458/1311859.pdfIn PDF document text
    • http://verogu.taurangacivicchoir.org.nz/uploads/1/3/0/7/130776485/vomepopatanum.pdfIn PDF document text
    • http://files.thefinishdepot.com/uploads/1/3/1/3/131398006/nofifevoxopunedejalu.pdfIn PDF document text
    • http://files.janvantblik.nl/uploads/1/3/2/7/132740362/ziwifej.pdfIn PDF document text
    • http://files.thepresenteur.com/uploads/1/3/0/8/130815095/wasuti.pdfIn PDF document text
    • http://files.ambleon.net/uploads/1/3/1/0/131070125/zulalusimutolosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/bujemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/37862567628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7206/files/72896234076.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d21c0_910ebfb2fc3344b28f9c51a9f8f4f577.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d2fda_f6590b57e2734beaa190822b349cf122.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7198c1_777a89e4207f45e998a7f830486c9ba2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/824332_93504c4db23a46b1ad80fe8d4fe7d906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7939 4684 bytes
SHA-256: f4b469a18c485018c7f4c488d06ac927e7c8a041d10966e67e90518fa4cc1c1d
font_01_sfnt_off00008904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8904 10864 bytes
SHA-256: e0f5d920b344ecfe6d24d268412ca2124d5b5ad94d8b2e728bf7cab8709f27a4
font_02_sfnt_off0000ae2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176