Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2905ed25934a4dc…

MALICIOUS

PDF

85.5 KB Created: 2021-03-06 11:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 51f2da8f85db244cb16473136421cbd2 SHA-1: 252cd065e54df757644ac3a691b03d3eb5f9c4c9 SHA-256: c2905ed25934a4dce5afb077d8a1bdbd13b42a487abdfed5f72c2d0a00b070ca
194 Risk Score

Malware Insights

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

The PDF document, disguised as a marketing plan outline, contains a significant number of external links, many of which point to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the heuristic findings suggest a link farm designed for SEO manipulation and user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/123?utm_term=how+to+make+a+marketing+plan+outline PDF link annotation
    • http://rigoditibalun.mywebcommunity.org/1001_spells_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/gdjh82F/nodar.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/hdjjDbc/narivolu.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/nopokulexavi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2439ab-2f6d-4355-8c0b-e5792ac9b3f9/who_are_the_norse_gods_and_goddesses.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_eb6d32014bcf4bd4bdea6cdc5665bd48.pdf?index=trueIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_0bdafbbcf4fd4e529ccec2eb8ef2cf71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/manual_lawn_mower_india.pdfIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_749cf63b74ab4394b95c133a2eb1db8b.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_4e77c92228744db8b291a743864ee344.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e4d84a-04c2-44bf-82a3-725b09bd6d64/how_do_i_reset_my_pioneer_radio_bluetooth.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_d749e5f31ee14370b3d5c20395ef16d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/8_step_problem_solving_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be97d991-4f3f-4b3a-8992-a4d97081b5b2/jilupelafefabulupuzipivoj.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_0a554291f84f44df98eb5c0d9df73116.pdf?index=trueIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_a0412e1f9621456cb047409a7b3e2835.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c037b8-a412-4aaa-a2ee-e295fb3111ed/deadpool_comic_books_marvel_database.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/manuel_pedagogique_d_alphabtisation_en.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/75740159810.pdfIn PDF document text
    • https://1e5cef04-603a-4a55-966b-a4237a424a2f.filesusr.com/ugd/b56239_1a2c10996a9d45eb83a0794aad2c82c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd0d789-865c-46a5-85af-0320e6a57196/what_is_literature_review_in_final_year_project.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_off00011178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11178 5080 bytes
SHA-256: 19e5cac727850b6d17ecdc682e0eea0755bae731d8d674db50915a4a4cff206c
font_01_sfnt_off000122bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BF 11204 bytes
SHA-256: 40604dda66e823ed43f98e612d702efe8d93d9ed75f2673430a0c8b070795a4f