Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8b059010a6a911…

MALICIOUS

PDF

79.3 KB Created: 2021-03-04 18:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01ad40a8a0a595557540430b7a270ca9 SHA-1: f84b8fcde3bfa1cbfaf25f5fc0464e7337fd91d2 SHA-256: 2a8b059010a6a91188367669abc4ae7d29e5749be3d6a9be25177aec2f051ec8
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/award?keyword=how+much+does+a+pulse+oximeter+cost PDF link annotation
    • http://misstourist.info/927045726182lv2i.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/b51d5.pdfIn PDF document text
    • http://sweetygirl.club/fusisisbg0yd.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/b3f22f495.pdfIn PDF document text
    • http://gouliwer.online/tedufefuvufabawesuxolisa6ac7k.pdfIn PDF document text
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/1b0e6b583b.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/rangers_apprentice_movie_cast_auditions.pdfIn PDF document text
    • http://idealicaitalia.website/wopuvegikepomaxo9u06x.pdfIn PDF document text
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/pewigizapuvo.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/79294982825kyi4h.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/meade_etx_60_manual.pdfIn PDF document text
    • http://devicesprotectionforusers.site/opera_browser_latest_apkcku7z.pdfIn PDF document text
    • https://gipodebitu.weebly.com/uploads/1/3/6/0/136000977/8397930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remuv/9870626073.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/41001844123.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 5208 bytes
SHA-256: 3ae5eea029e38febc2f0457ceba64bf7eeafc66cf2afb2a7f1ccfb2e270a2abb
font_01_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 10980 bytes
SHA-256: 9a02c7de0a0ac6668856f4f4a207aa58784e661d65b50afa28eba672d4d385bb
font_02_sfnt_off00012231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12231 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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