Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fc1393a7df2981…

MALICIOUS

PDF

38.6 KB Created: 2020-11-04 07:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f97b42dfe5ff8a25847cdfc89c28fcc3 SHA-1: 3b7d783cdeb8673e7266289947b642beb280627c SHA-256: a2fc1393a7df298174438144233a0cc575a64aa522dbb953e551dae2ff7101a5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a redirector that is flagged as malicious, likely serving as a lure for users searching for software downloads. The document body and embedded URLs suggest a phishing attempt disguised as a software download, specifically for Minecraft. The presence of multiple PDF links, some pointing to known malicious infrastructure, reinforces this assessment.

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://cctraff.ru/aws?keyword=minecraft+pe+1.1.4+download+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f8ff2689e043.pdfIn PDF document text
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/mijimipud-nefiv-dekuduxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f9207157d015.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/6720916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f99b570d846b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8dbe171b7cf.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/9df7448996f.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/7875018.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/henghuili-files2/5738257841.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/78405974849.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/teste_assertividade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed04a2a-0135-4681-a57a-6ddb2738ffc4/46140010146.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_off000052d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D0 5304 bytes
SHA-256: 04b38db817145f10e2e924f79f42df172946b6a360a6f028193ad61d5501899a
font_01_sfnt_off0000651d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651D 12608 bytes
SHA-256: c20663ef7ebe1cafed3e55b74b5d20cf9ab0f4b8f58b569eee7266e89df31176

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