Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aec65290a6edb4f…

MALICIOUS

PDF

83.7 KB Created: 2021-02-27 11:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a30edaf3e3de0d9bce4f8a6bdb270e3c SHA-1: 9ea484d97bbf77456685b641622064f40f02cdd5 SHA-256: 0aec65290a6edb4fb298463a2cfa46d60187e33c6664233e212677f807415f12
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, including one pointing to 'ponafet.ru', suggesting it is designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/123?utm_term=lakshmi+narasimha+karavalamba+stotram+sanskrit+pdf PDF link annotation
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/gifosaji-xadiwinuzevab-dowavap.pdfIn PDF document text
    • http://fejituwetogin.iblogger.org/49010451502.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/82238798504.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/vumevugis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_600fd573c7100.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/73242786537.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/8390655.pdfIn PDF document text
    • http://gozadelaluf.22web.org/labifunulitiviliwejo.pdfIn PDF document text
    • https://vumamoxaku.weebly.com/uploads/1/3/1/3/131380777/pomidasin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454163/normal_5fe38b4f46046.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/xobuxixomufusotom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_60308d5a81222.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/fcacf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rusakarazixano.epizy.com/birthday_invitation_background_templates.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/element_40_inch_roku_tv_review.pdfIn PDF document text
    • http://liluratomakawu.rf.gd/65030266754.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 5156 bytes
SHA-256: 8049f9051e54473794c3ecdb1ba23115e59cea18f577ad0203cdf5ccf6a1505c
font_01_sfnt_off00010ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE4 10576 bytes
SHA-256: d4ba2d094ef39babefe2ebefd8a1e7531c353a7a7cbd10abfe4b997d2f8bf26e
font_02_sfnt_off00013316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13316 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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