Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de1bcafd9f972a0…

MALICIOUS

PDF

42.1 KB Created: 2020-10-07 05:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 167db2e796ccd5d29b8c8a232fa2ba3d SHA-1: 73b32655f11b3a9bf6501a90b64794ea2b3d4756 SHA-256: 2de1bcafd9f972a0d85383253a16110f5afa43e6401ce76a1a7ed84da03aa5ee
154 Risk Score

Malware Insights

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

This PDF document contains embedded URLs that point to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a 'study guide' and the malicious URL itself, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of malicious redirector links indicates a high likelihood of a phishing or redirection attack.

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/pify?keyword=little+house+on+the+prairie+study+guide In PDF document text
    • http://wolix.henkpeetersarchive.info/uploads/1/3/1/4/131438860/109307.pdfIn PDF document text
    • http://gevodet.alissajacobscmt.com/uploads/1/3/1/4/131407552/853e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1231/5545/files/rikubun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8515/2927/files/jaburiborevikoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/make_ready_checklist_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9174/6712/files/4049781207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e44f996-012a-4016-8c71-90ee758c68f7/45015872523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ddaefa-5790-4b05-aa58-c22b246f16c0/bavewineladaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebf4a47-7945-4d36-b869-ca259de79db7/40470716566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598762dd-2470-4b80-92ff-66b262c9cea9/91289067933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a193857-fded-47a3-8b1c-8617491385c3/74153458034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11804d20-8e79-48ed-88d0-af5c15a32942/20780192080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0382d6c-0c68-4c75-9de5-fcb921c2951d/lapilususelinuwemek.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_off00006672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6672 5264 bytes
SHA-256: 50eadf63e9b916436f4b6b1115e69c574032efe0d1db37af5a0dfd14bda4ae9e
font_01_sfnt_off00007857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 10248 bytes
SHA-256: ab925690ef894b72d0b8604550a50f8be847896cae0e28fe93d87ef80560636c

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