Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94a809bd0ed31b2…

MALICIOUS

PDF

68.1 KB Created: 2021-01-15 07:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3911cf1c4df9d981bddd317ab6d4d925 SHA-1: 5243f7cf8a341e186599d0dcdcabf9c6cadbd0af SHA-256: e94a809bd0ed31b231dbd4115c25c701df3f7527e21f313c5f42cee710971f45
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, https://traffking.ru/aws?utm_term=bazaar+movie+ke+song, is directly embedded in the document. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO abuse to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=bazaar+movie+ke+song PDF link annotation
    • https://site-1203255.mozfiles.com/files/1203255/fesosewesobapuwas.pdfIn PDF document text
    • https://cdn.sqhk.co/dogatefi/1xCjfFm/dopevuzefedig.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/hg1oaAy/dulixesijudeko.pdfIn PDF document text
    • https://site-1177924.mozfiles.com/files/1177924/26732520815.pdfIn PDF document text
    • https://site-1171591.mozfiles.com/files/1171591/musiwimawafitefejaser.pdfIn PDF document text
    • https://site-1174473.mozfiles.com/files/1174473/k_yamet_kombat_arena_hile_oyun_indir_club.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/vofugexojarupamoza.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/baxegezivumi/matt_pelissier_mcr.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/cut_out_dress_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/easy_video_maker_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/wifebipiwolosamimer.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/phenol_chloroform_isoamyl_alcohol_extraction_principle.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_off0000cf85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF85 5196 bytes
SHA-256: 6245588c8a1e30e874c8410a4d70a8242d9ffa462742bf810931b104570d98fd
font_01_sfnt_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 10092 bytes
SHA-256: 568a7da959c4babceddb9c420c25bff092be83a817459b58d195f9c7961ef903

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