Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7a6617048834b0…

MALICIOUS

PDF

60.4 KB Created: 2020-11-08 03:11:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 61f043bbfac0b20d57482aa23133a2ff SHA-1: e613d9224d2c4110c13fde0091c4451000d36f13 SHA-256: 0a7a6617048834b0755e27e5ddf05ceca01b23b61eda169633ea8edca10b5cef
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'Harbor freight tools return policy no receipt' and a URL that appears to be part of a link farm. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/aws?keyword=harbor+freight+tools+return+policy+no+receipt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5f8e11abc5e4b.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/0c7de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5f961abd4c041.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/gakovenutesitikewako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f9163ff92887.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/felasorarabipis/zapufaxizavaxevuxam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3783b3-bd2f-4b35-b50b-35a3bf426bf7/zedux.pdfIn PDF document text
    • https://gibalon.files.wordpress.com/2020/11/31130515003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d01f8ca-34e4-497e-bdca-3407f2bc0452/maplestory_m_mod_apk_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bfae98-6a62-49e2-bf10-c8ed6abd9937/car_door_seal_replacement_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08334bc-cac1-4abd-9d1d-be98d6dd72c5/fojeloguruxoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3254aa-5f1d-4510-bb24-189755a027e4/guzaxutenivagevuni.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_off0000a0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D3 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off0000ab79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB79 5480 bytes
SHA-256: 402393e391c222bc29af0bf884eefc9351c180b391945cb2936bef954c76dc51
font_02_sfnt_off0000be23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE23 11128 bytes
SHA-256: 5e71ccf869cc2c2643aa0eb6d5265e88ad54630933943556b901e88993326b4b

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