Malicious PDF — malware analysis report

Static analysis result for SHA-256 061e17939b4d9a72…

MALICIOUS

PDF

66.2 KB Created: 2020-11-25 12:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 295e2effe97b625cdff8b1ec01a62b09 SHA-1: 184d233f5e834b5dbbc0e57a044e77adabe1dee4 SHA-256: 061e17939b4d9a7217a1d9d2616015d095259839af69c61272102906b62cb14a
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 0.9997

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://trafftec.ru/strik?utm_term=rate+of+change+graph+calculator PDF link annotation
    • https://luzoxunijasuw.weebly.com/uploads/1/3/4/3/134338954/1097730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5f90a5c2f2f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fa446c51c6a8.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/76f0f9a85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f879fb0f0796.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/vavebufevodutob/aztec_and_inca_compare_and_contrast.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/zing_ear_e89885.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/ap_ssc_memo_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407082af-eda6-43e7-8bfe-a69802566a84/19962049373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5beb1c5f-41cd-4273-b8f0-6e6a3454adaf/bibamumobogewigipupuwub.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/lagu_jeff_bernat_wrong_about_forever.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/38572110803.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_off0000c6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FD 5108 bytes
SHA-256: 0a3c639ea363989093fe758e20878607280562b7fb8d61b68ed3a8cf0d3a07fe
font_01_sfnt_off0000d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 10456 bytes
SHA-256: ea3756cc9cd033e7e7e63b7107676dea2a8a9c26655016f23e126ad46afa6eff