Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84a2564f62b350d…

MALICIOUS

PDF

40.0 KB Created: 2020-11-09 13:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 98654c324dbc47b6c08d0ac072ff9d62 SHA-1: 909feef705429cdb4bfeab6ab82db218c83a67a5 SHA-256: d84a2564f62b350db9378c160b00f216acdd8d3eb52529f6e75a841ab6bced41
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://trafficel.ru/123?keyword=tour+guide+questions+club+penguin+rewritten PDF link annotation
    • https://gilolubirej.weebly.com/uploads/1/3/4/3/134309297/dumutimemunedemo.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/8257782.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/wevefitojabiwozabof.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/xanebavifamopez/sezazudoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/vewezipurugutujumoja.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/38334729763.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/42122734598.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/adding_and_subtracting_matrices.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/concept_paper_example_for_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/exo_members_in_kdrama.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/mazanegune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7af808c-aebe-4954-8754-dcb0019b2642/4747452393.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/therapeutic_exercise_foundations_and_techniques_mcqs.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_off00005d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8F 5340 bytes
SHA-256: 9a4cde82b4da3586e4bf0f9df47090dc7c2df807ea1240bf75e83cb9f326d96e
font_01_sfnt_off00006fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD1 10264 bytes
SHA-256: 792e80fd9088ea8277d484cb5979edf77f79ba9a93f36d2926e75f552d5788bb