Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ed8b841b485d41…

MALICIOUS

PDF

84.1 KB Created: 2021-04-03 15:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 291fd86214f4cf25bfbc529f75317084 SHA-1: 7d13ba71e007615a7286c96704016aa9cd355497 SHA-256: d6ed8b841b485d41ed55cd4340cdad149d9e664c4f7a028d49320a6e189d24d0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, a common tactic for SEO spam or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=sigma+sport+targa+manual PDF link annotation
    • http://texoraw.sportsontheweb.net/baseline_survey_form.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/5141737443.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/bisuronivosul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedapewubu.epizy.com/58080736101.pdfIn PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_eb85514157b64b5baa4c83927bb17a88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/medieval_2_total_war_game_of_thrones_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe7bf9c-ef71-429f-b818-a27867c9684f/2020_ferrari_812_superfast_black.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/kiganomolajogifofakujer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf0ccc8-a9d1-4609-beb2-822833586f21/13937063505.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/bolacha_de_arroz_camil_informao_nutricional.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/blind_side_book.pdfIn PDF document text
    • http://wafugid.epizy.com/13137675971.pdfIn PDF document text
    • http://dogiperij.epizy.com/dejag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc72ae01-72fc-4e18-afd2-1d676de95419/dulibixutasegowi.pdfIn PDF document text
    • http://wipovevoliku.epizy.com/73774343081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd036bd-3189-41e3-b557-609221af3b05/past_tense_revision_worksheets_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b82b92c-5801-4891-812f-a3082b28ca7a/21575446384.pdfIn PDF document text
    • http://vomifavub.epizy.com/free_music_on_iphone_website.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_1b1e40c41721432a89eb367ac3525cd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/xadomesuvusemala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9358c95-b36c-416c-acd9-6003a4125716/jasanofunapulatulo.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_off00010812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 5240 bytes
SHA-256: a93b249e32d25567b24958460f8a570967d32c18969ad8ba62ce4302bdcef828
font_01_sfnt_off000119c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C9 13604 bytes
SHA-256: a050525c5728f0b2ce0c2f0231a85e1462d72a6b8659752ddeba638f3c897a69