Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a2c61bfefa98e0…

MALICIOUS

PDF

69.6 KB Created: 2021-01-06 05:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 092dcbcd28f5a258685456750d463e86 SHA-1: 5939b4f7060ea53e105acd2ed669af9efa46db66 SHA-256: 50a2c61bfefa98e0af3cf017cd31ca2b200e7158b4f13bef76a2bdcfae4977bf
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, a common social-engineering tactic. The embedded URL 'https://ggtraff.ru/aws?utm_term=aggiornamento+android+9+honor+view+10' is a primary indicator of malicious intent, likely serving as a redirector to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/aws?utm_term=aggiornamento+android+9+honor+view+10 In PDF document text
    • https://mikovenib.weebly.com/uploads/1/3/0/8/130813447/nipiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fb55344ce939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5fa3c68d7bc3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f8a5016883a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8a4dbd8a634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5f9cea9fc6a36.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/wekibik/jopajiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/numbers_spreadsheet_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/ashapurna_devi_books.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/59873562599.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/mazimiwatatibom.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/cbr600rr_2004_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/ielts_trainer_listening_test_5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/pimiloxagulomitafa.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/37787530733.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/clash_royale_windows_phone.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_off0000d3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CE 5520 bytes
SHA-256: c87978a75d385478183fc96537336e62848dd974098bfc28e6812f2f46f0f7ae
font_01_sfnt_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 10436 bytes
SHA-256: 6694f57440cb4797bb95042f6fcaaa5ebae5d8ebfd382893af07811abb293057

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