Malicious PDF — malware analysis report

Static analysis result for SHA-256 717ac4afbf7f6c18…

MALICIOUS

PDF

67.5 KB Created: 2020-10-16 15:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8c5aa1e7575644b6585195ee48af1cd5 SHA-1: f59bf0b745e33b000bc699332b858ca9287363ba SHA-256: 717ac4afbf7f6c18c0d165861bd8f995e5f6dba16cfef460768ec14e7977a24b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/pify?keyword=xperia+xz3+android+10+update In PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/zobizit-rezubova.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/3655500.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/sevuvevimuferijobaxo.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/xorufisefifamegitobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ebdf89-44ee-4e61-814e-7221fc778ee6/rejifikefejidabebosujog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c8fd45-01d2-48ff-8239-5bcbaa9ba72b/59667695442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf30aa7-e33a-4bda-b362-dd7447392998/nogogebad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7e5a20-d64c-4588-bfc2-db5f705dee99/zevubugusafarik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9a99e4-8572-4538-93e8-8f9e8e70c2bb/bolozexijunidibokagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a65f5b4-ad94-49f2-8874-64ca71bda7ef/96224453767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461e0e1a-a98b-4ff2-8e3f-41bbb0aa9ded/9490422308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3159/2597/files/valence_electrons_of_carbon_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3981/files/33185450909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2423/8757/files/minum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/fnaf_2_characters_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/adobe_acrobat_xi_pro_serial_number_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c15a106-dae5-47ac-a9e6-a50d648f8442/mamezetiseguwupewapasaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3f8e4b-bae5-49a4-a224-ea009fb50919/85757101547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c98e56-79ed-4c5a-b269-80eb887297b1/dezipik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a284cc7-e6f4-458d-ad99-b64fcc8cc143/gaboverotugowekevije.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_off0000a0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BA 5196 bytes
SHA-256: 41ea426b2425e10d3c7fd2dee7b947995aad7e3fd8a43145651a4753e082f776
font_01_sfnt_off0000b272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB272 3952 bytes
SHA-256: 592331118b62689fbb5063ac7ee74f81dce615317123e9492c8743ecb1525ce6
font_02_sfnt_off0000c196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC196 11164 bytes
SHA-256: dbcbac7269e1a98a105152504f5a726255aec2211af898955faad3f0242b6850
font_03_sfnt_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 17616 bytes
SHA-256: 03009684a698a4f1ae06048e44829cb8eef440ec824d9f23926b12a9e2482c7f