Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ded4928731e913a…

MALICIOUS

PDF

48.4 KB Created: 2020-11-09 12:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 55c5d96d4e592c724fdef4757929d935 SHA-1: d85671260bdd50d1cf3ccf276e27bce9af26d293 SHA-256: 9ded4928731e913aa02dd807c8f5675a379c6f05d2449079d319cbecba2bbed7
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=where+does+the+alchemist+take+place+in PDF link annotation
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/8640364.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/2963bdc586283.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/254530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fa8f05197785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5f930735a4000.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/375e246e-55f5-4e79-be2a-14f7ee3b55de/raaz_full_movie_hd_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b497434-8901-469c-b29d-74eec16efd2e/masonic_rings_for_sale_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846a6946-c9a1-4356-946b-f2b1abb89a4d/90890455160.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/able2extract_converter_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/fipofefusowo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/adolix_split_merge_portable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6090d1a-d068-4423-b209-45a41450a7f3/lupotonedodevobanixix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7101dbc4-5b85-4100-ab61-7d4f42d0dc15/73337508212.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/15486035404.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_off00007cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF0 5392 bytes
SHA-256: 50083dee3658f8f23c4e80987942401c5f756b1b149298cf1901c4ceca042ed9
font_01_sfnt_off00008f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F26 11084 bytes
SHA-256: a407a050655a499e8743a37882d78983f7416f62b4597e381da11b3fe54cab11