Malicious PDF — malware analysis report

Static analysis result for SHA-256 d272e6439acf7083…

MALICIOUS

PDF

50.0 KB Created: 2020-10-25 20:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2064aba50d20929e7ba63ec6aa812164 SHA-1: 46c387a16b8e84ce84a3b9cc656eeb5c8ede9bda SHA-256: d272e6439acf708354742fd36fefb35260d90203bf73eeb4f29dc951c380181a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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/aws?keyword=absceso+periapical+en+ni%25C3%25B1os+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f8a2de2b2931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f90d821c1fdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f90f11a6569e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f897c828c591.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/tuzixemaliv-sogatida-wajegabanu-neduvuruto.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/xajosefobirow-kekefogobezuz-tisuz.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/2503880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f870e97d1cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5f90a5b6447dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8ccbded7da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5f915040d6990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5feb22-97d5-4759-aec3-390c6d3fdb4a/soxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643e7cad-33ee-4dce-8d66-f93e8e737b70/61810247089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c41dc89-a736-4ac7-bf6e-88824bc21337/kojepevalefowavisejadise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0504/5668/files/whack_your_friend_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3082/6141/files/ceaseless_discharge_cheese_intentional.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/five_approaches_to_qualitative_research.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/famafuxapoved.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/75255946611.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_off0000801e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 5492 bytes
SHA-256: 8443c8d8783a7e45a2851c8a30bdcb0f7cd48c1291de65f0d7f3ca4c2637f6cf
font_01_sfnt_off0000927f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927F 11836 bytes
SHA-256: 06679f443fc5370d235067613bc673c4ef9837a00808de5924f21ef4c5888f39

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