Malicious PDF — malware analysis report

Static analysis result for SHA-256 be98722bbb54a386…

MALICIOUS

PDF

42.5 KB Created: 2020-10-10 06:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fb44f271239a57a37205e3bf4c8b34b8 SHA-1: 66f75c26d9e4e005acdbd170737022abd39b7ce9 SHA-256: be98722bbb54a386282bbd3aa2ae8ad8ac062fe6394b109a8330ac2e1f32c399
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/strik?keyword=peggle+blast+apkpure In PDF document text
    • http://files.hellojapanesl.com/uploads/1/3/1/4/131453048/monububixe.pdfIn PDF document text
    • http://files.ieselpicarral.com/uploads/1/3/1/3/131380275/3933941.pdfIn PDF document text
    • http://zaxesiko.macmccuskerceramics.com/uploads/1/3/2/6/132695399/627253.pdfIn PDF document text
    • http://files.littlebearlabradors.com/uploads/1/3/1/3/131383775/9542745.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/d2f5e44f-b5e9-46e7-9d30-88226a4ee1e8/47682382202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06004cc-ddda-4bac-aa0c-354fa2c140b1/10265571230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbe9a13-f199-4e42-9aac-2764789cbd4d/kavaniniganiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b637284-bb9e-4d54-b6b2-b9ae070c05e8/funol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4353/3212/files/devasumujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/riwotufededugaleduvowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5725/6869/files/extra_large_bathtub_shower_combo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52DE 5192 bytes
SHA-256: 1087ae18291b0ad0e2eadfd029981b636222fdee75ff442d6f40ac71364beedc
font_01_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 10368 bytes
SHA-256: 3d65f5ac845cbf5d6f411c9fbe84c0969809bbf66b09001444c202731aefe07e
font_02_sfnt_off00008851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17