Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06bba31b535ee8d…

MALICIOUS

PDF

43.7 KB Created: 2020-11-02 07:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 61779a4e1444e658769ec3fcf7ee2d40 SHA-1: b84c25e5eba5c65c93ffe18b4e372c32dd66d889 SHA-256: a06bba31b535ee8dbae045a24eda1a77be1fb18db0cbb473544e76a2476e3a2a
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL containing 'ge webcam driver download'. It also exhibits characteristics of a PDF link farm, with numerous external PDF links. The presence of a visual download button lure further supports a malicious intent to trick users into downloading further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?keyword=ge+webcam+driver+download In PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/a2f29a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazovugal/62729208354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae6f65f-c4a4-4e40-8ea5-1230154e97ef/42742174081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659a63b1-991c-4775-9702-03af74f1fa95/the_secret_behind_the_book_of_enoch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f194fd-0eb4-4923-94d4-5b296c74fc8e/53092922835.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/vufoxuderox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2933425-2a38-4ec7-9f0a-56673f6e5234/18001867953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aade4221-2ff1-41a5-b6c4-35720694e7a0/cc_nt_lnh_sau_nt_lnh_no_thot.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/87595348306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4494/5058/files/fopiwovukoxasubulev.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B48 5228 bytes
SHA-256: 2eb8bbbc0396e2a08e97d1ff1957073c5ecc508e5600dc6a2a961168ce6f1af3
font_01_sfnt_off00007d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 11328 bytes
SHA-256: ddb941f8eacb661d2d49f77170ce3e688e70f48dccf66aa80e572186e790fcf7

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