Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d76d1821d10d52a…

MALICIOUS

PDF

37.8 KB Created: 2020-10-14 18:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7da94f10d176b12f02fab4a111b85638 SHA-1: e1ad68dff667c5d46c7a12af5c48b44489b8492f SHA-256: 1d76d1821d10d52a7e95a904d61b039b800b9385073e10eca25cd1c62409b7a0
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.link/pify?keyword=sound+about+apk+apkpure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f87080e54816.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9031774.pdfIn PDF document text
    • https://site-1044152.mozfiles.com/files/1044152/84061136771.pdfIn PDF document text
    • https://site-1042023.mozfiles.com/files/1042023/80539008825.pdfIn PDF document text
    • https://site-1044440.mozfiles.com/files/1044440/pabopafexolufisuwivefo.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/1/0428/2449/9367/files/60404642289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/uva_online_judge_3n1_problem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3791/9902/files/76072714638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/how_to_write_to_whom_it_may_concern_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3952/1444/files/cisco_5508_firewall_configuration_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18945da1-91e2-4c4d-bcad-59698e2fd889/32992977506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ea676e-d641-40f0-8f72-7a073e53668a/49163092388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baac1d2-691a-41b1-afb8-45604437c234/kubaruvabixonilovasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82638cf7-1c91-4394-9392-a9d6556ee8d8/13598631769.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_off00004a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A19 4884 bytes
SHA-256: e57b9667ec8a82dae92068dc1610decd4e301e348da2c3f5279c6d3ba0be53ff
font_01_sfnt_off00005aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAC 9804 bytes
SHA-256: 22d2ca273b04e98d95053a0796ed56b08b1beac4249ff6824c94c9f526bee3bb
font_02_sfnt_off00007c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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