Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55fb328389b8323…

MALICIOUS

PDF

66.3 KB Created: 2020-11-29 23:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: c7b8df6f9ceb9f5d4cf22114f2797ac5 SHA-1: 5e1a90f4f2991649a0f7fe472df3c2c8101c0246 SHA-256: e55fb328389b8323558716ebed837d2a41f46add72b699451268696f2b7f697e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to direct users to harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this file, classifying it as phishing or a trojan.

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
  • 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.
  • 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://gettraff.ru/123?utm_term=how+to+enchant+with+commands+pe In PDF document text
    • https://maludanojuwido.weebly.com/uploads/1/3/4/5/134591959/3184967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_5faa0e50ea42d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8fbda2251c1.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/fezenur/lawyers_diary_and_manual_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/67006021743.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/psg_balanced_fund_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/92094630579.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/sefisididevufiwat.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/alone_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/treatment_of_bleeding_disorders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c5d8da-cfc8-4beb-b126-15158fba9e31/sombra_de_azul_incognito_banco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd59b68f-27bb-461b-bdba-8189a938c74f/togasovozasanepigalave.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/83073250915.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_off0000c436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC436 5240 bytes
SHA-256: 71829edd4136692efc30d25c6977d17386a1dff05a754aecfc8b4c7514197502
font_01_sfnt_off0000d5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F4 11280 bytes
SHA-256: 8195049c227460c8cc5a9802dc3f8651b7934138c27869ed6df10942702180bc

Open this report in the interactive analyzer, or submit your own file for analysis.