Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf7566ef505cbe5…

MALICIOUS

PDF

70.8 KB Created: 2020-08-23 16:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2668e80cb56c0fdbe2d55cf43cf56917 SHA-1: e5129b0d889d995a5cf621ee348ad353c514f751 SHA-256: fbf7566ef505cbe5cf5f3c6c263ab7b9c047cc636d42f9d4254b9b3e3307d859
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.ru/pify?keyword=2016+movies+bollywood+songs In PDF document text
    • http://fowaribe.climatechallenge.nz/uploads/1/3/1/8/131856706/zeruwa-pebopokafeta.pdfIn PDF document text
    • http://files.aslaksonpottery.com/uploads/1/3/0/8/130813550/c5d6629.pdfIn PDF document text
    • http://files.bcschooltennis.net/uploads/1/3/0/7/130775027/c796dcae4.pdfIn PDF document text
    • http://files.theberserkersofjomsburg.com/uploads/1/3/2/6/132682142/lufunupuzuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/digi_weigh_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/39975187690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/porof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/64228699698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/wuvese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/fitness_app_market_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/canon_mf620c_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/52152434796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/38317419301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/83758546842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/hiit_bodyweight_workout_plan.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E2 5620 bytes
SHA-256: ea3d2140dd336d7c9b85faed6135ccbf3423a171a03fb413315a677c369d2b7a
font_01_sfnt_off0000bb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB08 12592 bytes
SHA-256: 48568a0a9382ae7e634099a814f9de7926f972e7914f98f8a13146fe9e3768cf
font_02_sfnt_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 5532 bytes
SHA-256: 87207fc2e629248eccb5ff0e0c6d6ea8df94460c7e35a0e0cc31c3cc3aed9980

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