Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf684e317ab918a1…

MALICIOUS

PDF

77.4 KB Created: 2021-03-16 22:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9e0510386023168a111bca66e860f15e SHA-1: eab7b0983dc1f616d8aa1c92fd00ba19c4d49a70 SHA-256: cf684e317ab918a1c3a3d77339e97fd17e932e32e4065296ddbff1205e1d838b
244 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, identified as a UPS credential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign designed to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/6566146.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.
  • 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://crophysi.ru/strik?utm_term=what+are+the+three+types+of+progressive+resistance+exercises In PDF document text
    • https://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/6566146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_5fe8a6f0bd465.pdfIn PDF document text
    • http://zhk-samolet-krasnodar.info/38189835547n6kd5.pdfIn PDF document text
    • https://fozibopabedabe.weebly.com/uploads/1/3/6/0/136082219/1b1545c3d.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/14454532239.pdfIn PDF document text
    • http://poroda.site/7731846345h06h6.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/73255167513.pdfIn PDF document text
    • https://xaxafojub.weebly.com/uploads/1/3/0/7/130738676/9415188.pdfIn PDF document text
    • http://ukranews.icu/xawoxubezimerejopanoboboxodmhp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5fdc3e85887d1.pdfIn PDF document text
    • http://funanomofov.22web.org/zesafoliduwadoxase.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/bowinibib.pdfIn PDF document text
    • http://changepass.online/tintern_abbey_poem_bangla_translation58qmq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_60290101946b0.pdfIn PDF document text
    • https://wanitovamuk.weebly.com/uploads/1/3/5/3/135303456/ef1ae18aef0.pdfIn PDF document text
    • http://pobegikobej.iblogger.org/blackmagic_pocket_cinema_camera_4k_manual.pdfIn PDF document text
    • http://blog-millionaire.buzz/scout_and_guide_log_book_in_hindi0avbs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadamenukovizep.epizy.com/tugazoxepifekelivuxobe.pdfIn PDF document text
    • http://gemawinikifiv.myartsonline.com/vevuxureguvevipu.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_6d50b46b47b14ff2bd70343170aefd70.pdf?index=trueIn PDF document text
    • http://medexode.atwebpages.com/die_unendliche_geschichte_teil_2_dvd.pdfIn PDF document text
    • http://jibejobumo.rf.gd/80581226575.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_5670596e88034c37b4ce2539cc88830c.pdf?index=trueIn 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_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 5488 bytes
SHA-256: d9e6dc35cc4b89f6087c4ac1a9b389fb360786a18cbaf9fe0d3a1d12d21eee5c
font_01_sfnt_off000104c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 10216 bytes
SHA-256: 2ffc78e65f4e6a3b0ea195a433db0380dfb71ecf59b7ff932d03f8d69ce296c5

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