Malicious PDF — malware analysis report

Static analysis result for SHA-256 0570694043707a94…

MALICIOUS

PDF

91.0 KB Created: 2021-02-16 06:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d6710ee1346ec6cb52a8bc8636b22fd3 SHA-1: 84e525cadcf893821f8334e31f5f0b547f190f59 SHA-256: 0570694043707a9418c2cf2623583cbbf4bc665531db92491e5175dd3c80e1fa
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including ML classification and ClamAV, flagging it as a phishing attempt. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically indicates impersonation of Facebook and the use of a redirector to a phishing page. The embedded URLs, such as 'https://rorefodelubo.weebly.com/uploads/1/3/1/4/131452934/3488606.pdf', likely lead to the credential harvesting site. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing attack.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rorefodelubo.weebly.com/uploads/1/3/1/4/131452934/3488606.pdf.
  • 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://bologen.ru/strik?utm_term=an+employee+requests+personal+data+under+general+data+protection+regulation+%2528gdpr%2529+guidelines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382405/normal_6000b784b6f4b.pdfIn PDF document text
    • http://lnstagramsupportlives.com/xofinifuvutezurekabuq1ywu.pdfIn PDF document text
    • https://rorefodelubo.weebly.com/uploads/1/3/1/4/131452934/3488606.pdfIn PDF document text
    • http://trelon.fun/tutorial_metasploit_kali_linux_androidwn4az.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5ffaac8d0849c.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/vinuzetexiv-nuxine-junodotulev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_602af5f3eaed9.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/5654810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_6017b11126121.pdfIn PDF document text
    • https://navitadewota.weebly.com/uploads/1/3/4/0/134017874/7290855.pdfIn PDF document text
    • http://osthondroz.com/composite_functions_worksheet_with_answers_kuta314xo.pdfIn PDF document text
    • http://tikovg.xyz/comment_pratiquer_l_autosuggestionylgp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_601359b1e83e5.pdfIn PDF document text
    • http://cloudmarket.website/617558779503y3fj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konazosite.epizy.com/vazisanerekazuzusokolal.pdfIn PDF document text
    • http://lejemerane.epizy.com/zekisefotezubibazadanu.pdfIn PDF document text
    • http://xenemusexo.epizy.com/facebook_like_bot_free.pdfIn PDF document text
    • http://jejivosijej.rf.gd/33341800570.pdfIn PDF document text
    • http://vimobuzu.epizy.com/89100903415.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_off000124ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FF 5764 bytes
SHA-256: 9427aee51f0bec1935abedcce9b9db30bb4315540a9311629bda03486adc6dc3
font_01_sfnt_off0001389a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389A 10756 bytes
SHA-256: 997098f5ff6f0ce95b8fc6872ab954dc7a7dc92b2c996f065e2f96ff73b60ce9

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