Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd867dc500768b4…

MALICIOUS

PDF

74.6 KB Created: 2021-02-24 23:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d9caa7020aff1a0decf1a2ace5da7739 SHA-1: 748d1a97f401ab60848e2e9a02234587b41340b5 SHA-256: 7dd867dc500768b4eefb2e33101dfb8def92a68ba97a92ceb489001ce19304ea
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to external PDF files, indicating a link farm designed to redirect users to potentially malicious content. Heuristics confirm the presence of malicious redirector links and a link farm. The ClamAV detection and ML classifier further support the malicious nature of this document.

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
  • 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.
  • 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://yafferge.ru/award?keyword=whirlpool+b10p+water+cooler+parts In PDF document text
    • http://akfb.online/bhojpuri_movie_hd_pictureh4w3i.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/lilozewib-dotogumigasit.pdfIn PDF document text
    • http://save50.pro/4608705453l4irn.pdfIn PDF document text
    • http://austritkfa.com/honeywell_7-day_programmable_light_switch_timer_white_rpls530a1038_ubjnb6.pdfIn PDF document text
    • http://gigojosok.22web.org/tipos_de_expresion_oral_ejemplos.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/ad9552ce.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/80130336396.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/pasawe/kimom.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/22917698346.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/gisegifivol.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/aprendizaje_autonomo_introduccion.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/58187518255.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/cybex_car_seat_sirona_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/lotafutizorej.pdfIn PDF document text
    • http://pariwexeral.epizy.com/duserebizu.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_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 5460 bytes
SHA-256: 94b06b9ab1829f190f75e6629df05cae96df2defeb6e721ff49d249bc44d6299
font_01_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 10396 bytes
SHA-256: 37fe776e1977cb5ad8eb5c9564ca38b272f5e89b9cc04c78e8f63c19d70f7797

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