Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b42a48d177187c2…

MALICIOUS

PDF

43.7 KB Created: 2020-10-08 08:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 79aca811010fcfe4a8dbbfce47aa5e51 SHA-1: 20842bfa57ca1aeed0b901c4f2d27a4449cfbc24 SHA-256: 0b42a48d177187c234031e94be33fd9c529c1e7ceef46363c43b082cf3ca14c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lead users to harmful content. The heuristic PDF_SEO_LINK_FARM suggests this PDF is part of a larger link farm, likely for SEO poisoning or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=jitterbug+alcatel+one+touch+manual In PDF document text
    • http://votupix.thesprightlymovement.com/uploads/1/3/1/4/131406837/gesodefag.pdfIn PDF document text
    • http://jekedemag.forgiveninchrist.net/uploads/1/3/2/6/132682090/216fad.pdfIn PDF document text
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdfIn PDF document text
    • http://files.puppetstringnews.com/uploads/1/3/2/3/132302716/3931267b9033b.pdfIn PDF document text
    • http://zizexefig.phillipsbanini.org/uploads/1/3/1/0/131070450/492601.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://uploads.strikinglycdn.com/files/3b8fcf1d-771e-44b3-b12d-5ec0205aa5b4/1693598035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c31000-69ab-4d5d-ba4c-caa427e36f15/87312011377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a093a255-90c9-481c-9be6-8994b1db15b9/gufulirubogud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ca0159-6374-4197-aead-57c651216875/47450592759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c28efd-b7d8-44b4-91c5-bf0e8481a521/nokagokaxuvizegurovan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfec95f-de24-4761-8b21-8c7314b159b8/neronadisisuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97658d7a-3a4f-45f1-b626-2efd1a9da03e/72380732269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86b2aab-f7f1-4bdd-a8c4-dc5935be3575/46619251152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10365f93-fb4e-45fa-a8da-c5b1b631bd47/febejibebexekizukidemuru.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_off0000605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 5044 bytes
SHA-256: 2bffd26ab089bfbba45c9362c184d32dca0cb2a23f9fbaa047b88b7a5a242e0a
font_01_sfnt_off00007149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 10212 bytes
SHA-256: 1be18e35b64ca40ddb2b199e483c26501dfb2ab188f3eada7129acf7019ea74c
font_02_sfnt_off0000942d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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