Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9fd9bc55012c33…

MALICIOUS

PDF

75.7 KB Created: 2021-03-23 07:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0d1fc162cdb880683c60c1e8472b9165 SHA-1: dbf42bb33f9c6d692130948b8232eb1d7787988a SHA-256: 6f9fd9bc55012c33222d0ed9fddaa99fe156f908c6d7f1bf7256d2244f926907
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'download button' lure further supports a phishing or malicious redirection attempt. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific content, but the overall structure points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=cds+2020+1+question+paper+pdf PDF link annotation
    • https://cdn.sqhk.co/gunakawujo/hehgfN5/moonrise_arena_pixel_action_rpg_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/azLRQij/kaiser_permanente_jobs_washington.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_604459ca58997.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/dejcCBh/segamamumewoponifisipugu.pdfIn PDF document text
    • https://pidoruna.weebly.com/uploads/1/3/5/9/135966994/fawakev_petitu_puwudiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501495/normal_6049f611b2632.pdfIn PDF document text
    • https://jenodavosu.weebly.com/uploads/1/3/0/7/130775827/da84a2f620ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_6030370158fe8.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/dream_interpretation_dead_baby_deer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5ff0f6f613c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_6039f77bd8623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459483/normal_600bb6bf6458d.pdfIn PDF document text
    • http://nawukebakesejid.iblogger.org/formal_presentation_powerpoint.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejitakofiragi.epizy.com/programming_analyst_interview_questions_and_answers.pdfIn PDF document text
    • http://najekaweza.onlinewebshop.net/dinikodatogaduj.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/39878145787.pdfIn PDF document text
    • http://jotigosi.epizy.com/geographical_information_system_ebook.pdfIn PDF document text
    • http://bivoxubi.epizy.com/40925729748.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_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 5360 bytes
SHA-256: 8c5232234646eac8402f44b9087f9a1b99e7aaa480eb6a62bad90547843384cf
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 11216 bytes
SHA-256: da841564462f6c20f2f8e5cb82489c4c31351df83cde3983ea1523f935f1d7ef

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