Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a01514552f640e7…

MALICIOUS

PDF

81.9 KB Created: 2021-05-19 01:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 48f8d5aed5e035174fa109c9711f89dd SHA-1: 2e13ff3cecc15c5c6b8ca801f1c18a7afb62e32f SHA-256: 6a01514552f640e722bc7564e2caacc7c91926d6d931c2a0158332db994efb0d
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to downloading free software, which is a common lure. The presence of ClamAV detection and a high ML classifier score further indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+download+happy+wheels+full+version+for+free+pc PDF link annotation
    • https://sixuvowapunara.weebly.com/uploads/1/3/0/7/130738553/99ef97e7a3e20.pdfIn PDF document text
    • https://topulatemavi.weebly.com/uploads/1/3/4/3/134367493/vazikapodemilatofafo.pdfIn PDF document text
    • http://nujokopinud.iblogger.org/pexotizofel.pdfIn PDF document text
    • https://fokatofevi.weebly.com/uploads/1/3/2/7/132712268/kusuxalivo.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/jedevolef.pdfIn PDF document text
    • https://zurukonovode.weebly.com/uploads/1/3/1/3/131379219/fezelop.pdfIn PDF document text
    • https://foxanebipukete.weebly.com/uploads/1/3/4/3/134309218/fasivuwak.pdfIn PDF document text
    • https://tagalevef.weebly.com/uploads/1/3/0/8/130815582/17ac7.pdfIn PDF document text
    • https://bugigubagide.weebly.com/uploads/1/3/4/5/134586777/lanowirexi_lafuxavidod.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/buluk-jadakusosijima.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/967016.pdfIn PDF document text
    • https://musabonaxuzu.weebly.com/uploads/1/3/2/8/132815830/livobenagaxapo.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/efeec1ea000065d.pdfIn PDF document text
    • https://tusubolamofe.weebly.com/uploads/1/3/5/3/135322079/7595901.pdfIn PDF document text
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/defeboreze-bigutev-bivikenageneze-wutuvopi.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/6403352.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vurisadazuxe.epizy.com/68170451961.pdfIn PDF document text
    • http://momedeturus.epizy.com/geduzu.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/engineering_mechanics_dynamics_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/el_arte_de_no_amargarse_la_vida_rafael_santandreu.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/bunotaxakakekolu.pdfIn PDF document text
    • http://peraguzenoruwof.rf.gd/6553855421.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_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 5460 bytes
SHA-256: 7f9e4b7ea8ac5755024ab3bbcb3498021f2df77888c3ef37698f71c33a13f16d
font_01_sfnt_off00011319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11319 11384 bytes
SHA-256: 107c2b8cd11d92c3be190f1aa67850b11cb0c0d1b76775548f0af2f098e890be