Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac66035185f3146c…

MALICIOUS

PDF

52.4 KB Created: 2020-10-08 17:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 94bc33e324b3f6b36e41d7c9c4a5f38f SHA-1: 60d46e6153ddd4777d4a1932bd7f2d42a9422d05 SHA-256: ac66035185f3146cd2622c6c4a3326dd79ccadd15811f087f86999bc5a180b85
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links pointing to various external PDF files, many hosted on disposable domains. One of the primary links redirects to a known malicious infrastructure, suggesting a phishing or SEO spam campaign. The document body itself is heavily obfuscated and contains a URL that appears to be part of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=what+is+scp+096+made+of In PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/rebafofiwavosug.pdfIn PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/6469118443.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/botivaf.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/25758714218.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/82482468077.pdfIn PDF document text
    • http://files.cocoandcoboutique.com/uploads/1/3/0/9/130969991/vejirasedojalu_jexezaj_podexenajezati.pdfIn PDF document text
    • http://xebebifag.hockeyaustralia.net/uploads/1/3/0/7/130775797/rivakipezatifesolu.pdfIn PDF document text
    • http://files.matandnick.com/uploads/1/3/1/4/131437886/lurumete.pdfIn PDF document text
    • http://nototomeg.stormvisionhsv.com/uploads/1/3/0/9/130969476/8967633.pdfIn PDF document text
    • http://files.fotosations.com/uploads/1/3/1/0/131069839/fa4a9b0cdd58523.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/a64be5bc-3924-4754-a4fa-8254657e35e6/238171473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26527c7-0d66-4142-9631-40eff504a384/duwopalerunotoruzixopuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fc4c05-a1fd-4f44-9b68-b2a267066ea5/68872794029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b028e3bd-eebb-4128-ba72-8433671c465c/nizexix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0568e8-c08e-41d4-b313-836d0b3761f4/neponotoxexok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5633b3-5d2f-4465-a8ac-ae555990e99c/28800427569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fadf617-7662-4853-ae95-7199fbae95c3/zoraw.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_off00008d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8A 5732 bytes
SHA-256: 94975275a1faab0ef61f5239b93d234c8ecd6e34958e24e4c375619428e9596b
font_01_sfnt_off0000a0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F7 10580 bytes
SHA-256: 19880794b9daecf8ae223adde6891f31a1bde024190e4c319e664c4822e65ee0

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