Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b4c0f708aa3882…

MALICIOUS

PDF

48.3 KB Created: 2020-10-16 13:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6bdf47aefdacae710a3055400b5548a6 SHA-1: d49c55f31283c89c484d3463515b2fc7c9f20291 SHA-256: 22b4c0f708aa3882c84dbda9fb081eb4525d6de6e82495e79ebbcfba1d59e4ec
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://gettraff.ru/123?keyword=best+android+games+2020+may In PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/pokerenedima-zutofi-kipijot.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/wutebixevelum.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/pawotexoxaramitase.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/nogewamuvuzoli-kadujuzusuzo-jagebepazo-faposu.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/1/0482/2558/3261/files/kebimenuwiwisunipebaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5130/9473/files/37536004680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2259/6768/files/brightburn_blu_ray_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0102/6981/files/etea_guideline_merit_list_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fb6cf4-45f5-4cf5-ab37-460722905367/gimegiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724609d5-9984-45a5-9976-ac25eec56b8f/76218603656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff6dea3-f689-4420-8fdc-0b3c93077528/96290603453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4dd477-ed05-496e-af20-073e063601b2/30556722854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223a92f1-3316-42de-b84b-f6bbce0adc82/kunisate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a95bd9-6f1a-41d7-a835-dc7baa613a22/86626038289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2183f7ed-e771-40f8-b8d1-4b2e74be9752/5929571522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0b2f92-9556-4497-a737-2996f8676634/38928202995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3bbd2a-5aa3-45d5-b575-fa642247a8a8/38360235151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9fba75-7764-4a6a-837e-621b8845b570/41745834311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc74f319-8fb1-4fc7-8236-d207808d7277/komasunezenajunanitis.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_off00006ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 5324 bytes
SHA-256: 7addb9dd86e5ce6b288d55567386dcfee6a6fdd736520a4f895d6d4b59c82fd7
font_01_sfnt_off000081fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FD 10364 bytes
SHA-256: bb05ea21d0187589581c49d3bd609ded1302b8ff1777c4c3f88503ea5fd586bf
font_02_sfnt_off0000a57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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